cpython-lru_cache-weakref: Doc/lib/libcodecs.tex annotate

annotate Doc/lib/libcodecs.tex @ 28646:193b8aec00ce legacy-trunk

Changes from Jonathan Riehl to allow his pgen extension (PEP 269) to work. This includes some more code that used to be part of pgen in the main parser; I'm okay with that. I'll see if the Windows build needs work next.

author	Guido van Rossum <guido@python.org>
date	Thu, 17 Apr 2003 14:55:42 +0000
parents	c267f28724dd
children	d41d8de9768f

rev	line source
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	1 \section{\module{codecs} ---
12274 559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	2 Codec registry and base classes}
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	3
12274 559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	4 \declaremodule{standard}{codecs}
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	5 \modulesynopsis{Encode and decode data and streams.}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	6 \moduleauthor{Marc-Andre Lemburg}{mal@lemburg.com}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	7 \sectionauthor{Marc-Andre Lemburg}{mal@lemburg.com}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	8
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	9
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	10 \index{Unicode}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	11 \index{Codecs}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	12 \indexii{Codecs}{encode}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	13 \indexii{Codecs}{decode}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	14 \index{streams}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	15 \indexii{stackable}{streams}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	16
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	17
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	18 This module defines base classes for standard Python codecs (encoders
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	19 and decoders) and provides access to the internal Python codec
25091 0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	20 registry which manages the codec and error handling lookup process.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	21
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	22 It defines the following functions:
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	23
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	24 \begin{funcdesc}{register}{search_function}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	25 Register a codec search function. Search functions are expected to
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	26 take one argument, the encoding name in all lower case letters, and
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	27 return a tuple of functions \code{(\var{encoder}, \var{decoder}, \var{stream_reader},
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	28 \var{stream_writer})} taking the following arguments:
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	29
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	30 \var{encoder} and \var{decoder}: These must be functions or methods
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	31 which have the same interface as the
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	32 \method{encode()}/\method{decode()} methods of Codec instances (see
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	33 Codec Interface). The functions/methods are expected to work in a
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	34 stateless mode.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	35
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	36 \var{stream_reader} and \var{stream_writer}: These have to be
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	37 factory functions providing the following interface:
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	38
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	39 \code{factory(\var{stream}, \var{errors}='strict')}
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	40
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	41 The factory functions must return objects providing the interfaces
12274 559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	42 defined by the base classes \class{StreamWriter} and
559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	43 \class{StreamReader}, respectively. Stream codecs can maintain
559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	44 state.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	45
12274 559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	46 Possible values for errors are \code{'strict'} (raise an exception
559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	47 in case of an encoding error), \code{'replace'} (replace malformed
26294 6d0cd80e2804 Document additional error handling names available through PEP 293. Walter Dörwald <walter@livinglogic.de> parents: 26099 diff changeset	48 data with a suitable replacement marker, such as \character{?}),
12274 559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	49 \code{'ignore'} (ignore malformed data and continue without further
26294 6d0cd80e2804 Document additional error handling names available through PEP 293. Walter Dörwald <walter@livinglogic.de> parents: 26099 diff changeset	50 notice), \code{'xmlcharrefreplace'} (replace with the appropriate XML
6d0cd80e2804 Document additional error handling names available through PEP 293. Walter Dörwald <walter@livinglogic.de> parents: 26099 diff changeset	51 character reference (for encoding only)) and \code{'backslashreplace'}
6d0cd80e2804 Document additional error handling names available through PEP 293. Walter Dörwald <walter@livinglogic.de> parents: 26099 diff changeset	52 (replace with backslashed escape sequences (for encoding only)) as
6d0cd80e2804 Document additional error handling names available through PEP 293. Walter Dörwald <walter@livinglogic.de> parents: 26099 diff changeset	53 well as any other error handling name defined via
6d0cd80e2804 Document additional error handling names available through PEP 293. Walter Dörwald <walter@livinglogic.de> parents: 26099 diff changeset	54 \function{register_error()}.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	55
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	56 In case a search function cannot find a given encoding, it should
12274 559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	57 return \code{None}.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	58 \end{funcdesc}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	59
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	60 \begin{funcdesc}{lookup}{encoding}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	61 Looks up a codec tuple in the Python codec registry and returns the
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	62 function tuple as defined above.
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	63
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	64 Encodings are first looked up in the registry's cache. If not found,
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	65 the list of registered search functions is scanned. If no codecs tuple
12274 559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	66 is found, a \exception{LookupError} is raised. Otherwise, the codecs
559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	67 tuple is stored in the cache and returned to the caller.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	68 \end{funcdesc}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	69
23112 a3c982d412b4 typo Skip Montanaro <skip@pobox.com> parents: 23087 diff changeset	70 To simplify access to the various codecs, the module provides these
19982 bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	71 additional functions which use \function{lookup()} for the codec
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	72 lookup:
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	73
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	74 \begin{funcdesc}{getencoder}{encoding}
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	75 Lookup up the codec for the given encoding and return its encoder
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	76 function.
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	77
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	78 Raises a \exception{LookupError} in case the encoding cannot be found.
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	79 \end{funcdesc}
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	80
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	81 \begin{funcdesc}{getdecoder}{encoding}
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	82 Lookup up the codec for the given encoding and return its decoder
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	83 function.
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	84
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	85 Raises a \exception{LookupError} in case the encoding cannot be found.
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	86 \end{funcdesc}
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	87
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	88 \begin{funcdesc}{getreader}{encoding}
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	89 Lookup up the codec for the given encoding and return its StreamReader
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	90 class or factory function.
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	91
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	92 Raises a \exception{LookupError} in case the encoding cannot be found.
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	93 \end{funcdesc}
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	94
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	95 \begin{funcdesc}{getwriter}{encoding}
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	96 Lookup up the codec for the given encoding and return its StreamWriter
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	97 class or factory function.
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	98
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	99 Raises a \exception{LookupError} in case the encoding cannot be found.
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	100 \end{funcdesc}
bf4b1b08a2c6 Docs and News item for the codecs.py additions. Marc-André Lemburg <mal@egenix.com> parents: 16127 diff changeset	101
25091 0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	102 \begin{funcdesc}{register_error}{name, error_handler}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	103 Register the error handling function \var{error_handler} under the
25172 5a17f0978326 Fix typo. Close SF Bug 606354. Raymond Hettinger <python@rcn.com> parents: 25091 diff changeset	104 name \var{name}. \var{error_handler} will be called during encoding
25091 0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	105 and decoding in case of an error, when \var{name} is specified as the
27555 c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	106 errors parameter.
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	107
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	108 For encoding \var{error_handler} will be called with a
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	109 \exception{UnicodeEncodeError} instance, which contains information about
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	110 the location of the error. The error handler must either raise this or
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	111 a different exception or return a tuple with a replacement for the
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	112 unencodable part of the input and a position where encoding should
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	113 continue. The encoder will encode the replacement and continue encoding
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	114 the original input at the specified position. Negative position values
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	115 will be treated as being relative to the end of the input string. If the
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	116 resulting position is out of bound an IndexError will be raised.
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	117
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	118 Decoding and translating works similar, except \exception{UnicodeDecodeError}
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	119 or \exception{UnicodeTranslateError} will be passed to the handler and
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	120 that the replacement from the error handler will be put into the output
c267f28724dd Change the treatment of positions returned by PEP293 Walter Dörwald <walter@livinglogic.de> parents: 26943 diff changeset	121 directly.
25091 0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	122 \end{funcdesc}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	123
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	124 \begin{funcdesc}{lookup_error}{name}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	125 Return the error handler previously register under the name \var{name}.
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	126
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	127 Raises a \exception{LookupError} in case the handler cannot be found.
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	128 \end{funcdesc}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	129
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	130 \begin{funcdesc}{strict_errors}{exception}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	131 Implements the \code{strict} error handling.
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	132 \end{funcdesc}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	133
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	134 \begin{funcdesc}{replace_errors}{exception}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	135 Implements the \code{replace} error handling.
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	136 \end{funcdesc}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	137
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	138 \begin{funcdesc}{ignore_errors}{exception}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	139 Implements the \code{ignore} error handling.
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	140 \end{funcdesc}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	141
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	142 \begin{funcdesc}{xmlcharrefreplace_errors_errors}{exception}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	143 Implements the \code{xmlcharrefreplace} error handling.
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	144 \end{funcdesc}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	145
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	146 \begin{funcdesc}{backslashreplace_errors_errors}{exception}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	147 Implements the \code{backslashreplace} error handling.
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	148 \end{funcdesc}
0337dad8403e PEP 293 implemention (from SF patch http://www.python.org/sf/432401) Walter Dörwald <walter@livinglogic.de> parents: 23658 diff changeset	149
25989 611af79c0e89 Move introductory sentence to where it belongs. Walter Dörwald <walter@livinglogic.de> parents: 25172 diff changeset	150 To simplify working with encoded files or stream, the module
611af79c0e89 Move introductory sentence to where it belongs. Walter Dörwald <walter@livinglogic.de> parents: 25172 diff changeset	151 also defines these utility functions:
611af79c0e89 Move introductory sentence to where it belongs. Walter Dörwald <walter@livinglogic.de> parents: 25172 diff changeset	152
13696 bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	153 \begin{funcdesc}{open}{filename, mode\optional{, encoding\optional{,
bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	154 errors\optional{, buffering}}}}
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	155 Open an encoded file using the given \var{mode} and return
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	156 a wrapped version providing transparent encoding/decoding.
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	157
20580 376ee174ecd0 Use the \note and \warning macros where appropriate. Fred Drake <fdrake@acm.org> parents: 19982 diff changeset	158 \note{The wrapped version will only accept the object format
13696 bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	159 defined by the codecs, i.e.\ Unicode objects for most built-in
bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	160 codecs. Output is also codec-dependent and will usually be Unicode as
20580 376ee174ecd0 Use the \note and \warning macros where appropriate. Fred Drake <fdrake@acm.org> parents: 19982 diff changeset	161 well.}
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	162
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	163 \var{encoding} specifies the encoding which is to be used for the
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	164 the file.
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	165
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	166 \var{errors} may be given to define the error handling. It defaults
13696 bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	167 to \code{'strict'} which causes a \exception{ValueError} to be raised
bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	168 in case an encoding error occurs.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	169
12274 559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	170 \var{buffering} has the same meaning as for the built-in
559b25a79032 Make sure the \declaremodule uses the right name for the module! Fred Drake <fdrake@acm.org> parents: 12260 diff changeset	171 \function{open()} function. It defaults to line buffered.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	172 \end{funcdesc}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	173
13696 bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	174 \begin{funcdesc}{EncodedFile}{file, input\optional{,
bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	175 output\optional{, errors}}}
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	176 Return a wrapped version of file which provides transparent
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	177 encoding translation.
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	178
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	179 Strings written to the wrapped file are interpreted according to the
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	180 given \var{input} encoding and then written to the original file as
13696 bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	181 strings using the \var{output} encoding. The intermediate encoding will
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	182 usually be Unicode but depends on the specified codecs.
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	183
13696 bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	184 If \var{output} is not given, it defaults to \var{input}.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	185
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	186 \var{errors} may be given to define the error handling. It defaults to
13696 bb364d6f9f69 Fix small typos and markup consistency nits. Fred Drake <fdrake@acm.org> parents: 12274 diff changeset	187 \code{'strict'}, which causes \exception{ValueError} to be raised in case
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	188 an encoding error occurs.
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	189 \end{funcdesc}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	190
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	191 The module also provides the following constants which are useful
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	192 for reading and writing to platform dependent files:
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	193
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	194 \begin{datadesc}{BOM}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	195 \dataline{BOM_BE}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	196 \dataline{BOM_LE}
23658 94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	197 \dataline{BOM_UTF8}
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	198 \dataline{BOM_UTF16}
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	199 \dataline{BOM_UTF16_BE}
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	200 \dataline{BOM_UTF16_LE}
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	201 \dataline{BOM_UTF32}
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	202 \dataline{BOM_UTF32_BE}
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	203 \dataline{BOM_UTF32_LE}
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	204 These constants define various encodings of the Unicode byte order mark
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	205 (BOM) used in UTF-16 and UTF-32 data streams to indicate the byte order
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	206 used in the stream or file and in UTF-8 as a Unicode signature.
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	207 \constant{BOM_UTF16} is either \constant{BOM_UTF16_BE} or
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	208 \constant{BOM_UTF16_LE} depending on the platform's native byte order,
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	209 \constant{BOM} is an alias for \constant{BOM_UTF16}, \constant{BOM_LE}
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	210 for \constant{BOM_UTF16_LE} and \constant{BOM_BE} for \constant{BOM_UTF16_BE}.
94aa4eb9bb7d Add constants BOM_UTF8, BOM_UTF16, BOM_UTF16_LE, BOM_UTF16_BE, Walter Dörwald <walter@livinglogic.de> parents: 23112 diff changeset	211 The others represent the BOM in UTF-8 and UTF-32 encodings.
12260 8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	212 \end{datadesc}
8c0f863ba50c Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: diff changeset	213
16127 6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	214
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	215 \begin{seealso}
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	216 \seeurl{http://sourceforge.net/projects/python-codecs/}{A
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	217 SourceForge project working on additional support for Asian
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	218 codecs for use with Python. They are in the early stages of
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	219 development at the time of this writing --- look in their
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	220 FTP area for downloadable files.}
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	221 \end{seealso}
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	222
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	223
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	224 \subsection{Codec Base Classes}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	225
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	226 The \module{codecs} defines a set of base classes which define the
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	227 interface and can also be used to easily write you own codecs for use
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	228 in Python.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	229
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	230 Each codec has to define four interfaces to make it usable as codec in
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	231 Python: stateless encoder, stateless decoder, stream reader and stream
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	232 writer. The stream reader and writers typically reuse the stateless
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	233 encoder/decoder to implement the file protocols.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	234
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	235 The \class{Codec} class defines the interface for stateless
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	236 encoders/decoders.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	237
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	238 To simplify and standardize error handling, the \method{encode()} and
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	239 \method{decode()} methods may implement different error handling
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	240 schemes by providing the \var{errors} string argument. The following
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	241 string values are defined and implemented by all standard Python
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	242 codecs:
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	243
16127 6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	244 \begin{tableii}{l\|l}{code}{Value}{Meaning}
26099 135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	245 \lineii{'strict'}{Raise \exception{UnicodeError} (or a subclass);
16127 6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	246 this is the default.}
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	247 \lineii{'ignore'}{Ignore the character and continue with the next.}
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	248 \lineii{'replace'}{Replace with a suitable replacement character;
6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	249 Python will use the official U+FFFD REPLACEMENT
26099 135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	250 CHARACTER for the built-in Unicode codecs on
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	251 decoding and '?' on encoding.}
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	252 \lineii{'xmlcharrefreplace'}{Replace with the appropriate XML
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	253 character reference (only for encoding).}
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	254 \lineii{'backslashreplace'}{Replace with backslashed escape sequences
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	255 (only for encoding).}
16127 6f1fd8500398 Added link to the "Python Codecs" project at SourceForge. Fred Drake <fdrake@acm.org> parents: 15186 diff changeset	256 \end{tableii}
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	257
26099 135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	258 The set of allowed values can be extended via \method{register_error}.
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	259
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	260
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	261 \subsubsection{Codec Objects \label{codec-objects}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	262
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	263 The \class{Codec} class defines these methods which also define the
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	264 function interfaces of the stateless encoder and decoder:
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	265
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	266 \begin{methoddesc}{encode}{input\optional{, errors}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	267 Encodes the object \var{input} and returns a tuple (output object,
23087 09db3f5d0bd0 added small clarification to the descriptions of encode() and decode() Skip Montanaro <skip@pobox.com> parents: 20580 diff changeset	268 length consumed). While codecs are not restricted to use with Unicode, in
09db3f5d0bd0 added small clarification to the descriptions of encode() and decode() Skip Montanaro <skip@pobox.com> parents: 20580 diff changeset	269 a Unicode context, encoding converts a Unicode object to a plain string
09db3f5d0bd0 added small clarification to the descriptions of encode() and decode() Skip Montanaro <skip@pobox.com> parents: 20580 diff changeset	270 using a particular character set encoding (e.g., \code{cp1252} or
09db3f5d0bd0 added small clarification to the descriptions of encode() and decode() Skip Montanaro <skip@pobox.com> parents: 20580 diff changeset	271 \code{iso-8859-1}).
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	272
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	273 \var{errors} defines the error handling to apply. It defaults to
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	274 \code{'strict'} handling.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	275
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	276 The method may not store state in the \class{Codec} instance. Use
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	277 \class{StreamCodec} for codecs which have to keep state in order to
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	278 make encoding/decoding efficient.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	279
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	280 The encoder must be able to handle zero length input and return an
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	281 empty object of the output object type in this situation.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	282 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	283
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	284 \begin{methoddesc}{decode}{input\optional{, errors}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	285 Decodes the object \var{input} and returns a tuple (output object,
23087 09db3f5d0bd0 added small clarification to the descriptions of encode() and decode() Skip Montanaro <skip@pobox.com> parents: 20580 diff changeset	286 length consumed). In a Unicode context, decoding converts a plain string
09db3f5d0bd0 added small clarification to the descriptions of encode() and decode() Skip Montanaro <skip@pobox.com> parents: 20580 diff changeset	287 encoded using a particular character set encoding to a Unicode object.
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	288
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	289 \var{input} must be an object which provides the \code{bf_getreadbuf}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	290 buffer slot. Python strings, buffer objects and memory mapped files
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	291 are examples of objects providing this slot.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	292
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	293 \var{errors} defines the error handling to apply. It defaults to
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	294 \code{'strict'} handling.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	295
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	296 The method may not store state in the \class{Codec} instance. Use
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	297 \class{StreamCodec} for codecs which have to keep state in order to
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	298 make encoding/decoding efficient.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	299
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	300 The decoder must be able to handle zero length input and return an
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	301 empty object of the output object type in this situation.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	302 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	303
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	304 The \class{StreamWriter} and \class{StreamReader} classes provide
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	305 generic working interfaces which can be used to implement new
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	306 encodings submodules very easily. See \module{encodings.utf_8} for an
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	307 example on how this is done.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	308
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	309
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	310 \subsubsection{StreamWriter Objects \label{stream-writer-objects}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	311
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	312 The \class{StreamWriter} class is a subclass of \class{Codec} and
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	313 defines the following methods which every stream writer must define in
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	314 order to be compatible to the Python codec registry.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	315
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	316 \begin{classdesc}{StreamWriter}{stream\optional{, errors}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	317 Constructor for a \class{StreamWriter} instance.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	318
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	319 All stream writers must provide this constructor interface. They are
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	320 free to add additional keyword arguments, but only the ones defined
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	321 here are used by the Python codec registry.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	322
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	323 \var{stream} must be a file-like object open for writing (binary)
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	324 data.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	325
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	326 The \class{StreamWriter} may implement different error handling
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	327 schemes by providing the \var{errors} keyword argument. These
26099 135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	328 parameters are predefined:
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	329
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	330 \begin{itemize}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	331 \item \code{'strict'} Raise \exception{ValueError} (or a subclass);
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	332 this is the default.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	333 \item \code{'ignore'} Ignore the character and continue with the next.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	334 \item \code{'replace'} Replace with a suitable replacement character
26099 135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	335 \item \code{'xmlcharrefreplace'} Replace with the appropriate XML
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	336 character reference
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	337 \item \code{'backslashreplace'} Replace with backslashed escape sequences.
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	338 \end{itemize}
26099 135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	339
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	340 The \var{errors} argument will be assigned to an attribute of the
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	341 same name. Assigning to this attribute makes it possible to switch
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	342 between different error handling strategies during the lifetime
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	343 of the \class{StreamWriter} object.
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	344
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	345 The set of allowed values for the \var{errors} argument can
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	346 be extended with \function{register_error()}.
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	347 \end{classdesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	348
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	349 \begin{methoddesc}{write}{object}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	350 Writes the object's contents encoded to the stream.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	351 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	352
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	353 \begin{methoddesc}{writelines}{list}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	354 Writes the concatenated list of strings to the stream (possibly by
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	355 reusing the \method{write()} method).
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	356 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	357
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	358 \begin{methoddesc}{reset}{}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	359 Flushes and resets the codec buffers used for keeping state.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	360
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	361 Calling this method should ensure that the data on the output is put
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	362 into a clean state, that allows appending of new fresh data without
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	363 having to rescan the whole stream to recover state.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	364 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	365
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	366 In addition to the above methods, the \class{StreamWriter} must also
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	367 inherit all other methods and attribute from the underlying stream.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	368
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	369
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	370 \subsubsection{StreamReader Objects \label{stream-reader-objects}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	371
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	372 The \class{StreamReader} class is a subclass of \class{Codec} and
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	373 defines the following methods which every stream reader must define in
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	374 order to be compatible to the Python codec registry.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	375
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	376 \begin{classdesc}{StreamReader}{stream\optional{, errors}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	377 Constructor for a \class{StreamReader} instance.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	378
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	379 All stream readers must provide this constructor interface. They are
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	380 free to add additional keyword arguments, but only the ones defined
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	381 here are used by the Python codec registry.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	382
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	383 \var{stream} must be a file-like object open for reading (binary)
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	384 data.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	385
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	386 The \class{StreamReader} may implement different error handling
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	387 schemes by providing the \var{errors} keyword argument. These
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	388 parameters are defined:
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	389
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	390 \begin{itemize}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	391 \item \code{'strict'} Raise \exception{ValueError} (or a subclass);
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	392 this is the default.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	393 \item \code{'ignore'} Ignore the character and continue with the next.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	394 \item \code{'replace'} Replace with a suitable replacement character.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	395 \end{itemize}
26099 135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	396
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	397 The \var{errors} argument will be assigned to an attribute of the
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	398 same name. Assigning to this attribute makes it possible to switch
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	399 between different error handling strategies during the lifetime
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	400 of the \class{StreamReader} object.
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	401
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	402 The set of allowed values for the \var{errors} argument can
135f08b73bd5 Add documentation for the PEP 293 functionality: Walter Dörwald <walter@livinglogic.de> parents: 25989 diff changeset	403 be extended with \function{register_error()}.
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	404 \end{classdesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	405
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	406 \begin{methoddesc}{read}{\optional{size}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	407 Decodes data from the stream and returns the resulting object.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	408
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	409 \var{size} indicates the approximate maximum number of bytes to read
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	410 from the stream for decoding purposes. The decoder can modify this
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	411 setting as appropriate. The default value -1 indicates to read and
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	412 decode as much as possible. \var{size} is intended to prevent having
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	413 to decode huge files in one step.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	414
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	415 The method should use a greedy read strategy meaning that it should
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	416 read as much data as is allowed within the definition of the encoding
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	417 and the given size, e.g. if optional encoding endings or state
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	418 markers are available on the stream, these should be read too.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	419 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	420
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	421 \begin{methoddesc}{readline}{[size]}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	422 Read one line from the input stream and return the
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	423 decoded data.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	424
20580 376ee174ecd0 Use the \note and \warning macros where appropriate. Fred Drake <fdrake@acm.org> parents: 19982 diff changeset	425 Unlike the \method{readlines()} method, this method inherits
15186 b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	426 the line breaking knowledge from the underlying stream's
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	427 \method{readline()} method -- there is currently no support for line
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	428 breaking using the codec decoder due to lack of line buffering.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	429 Sublcasses should however, if possible, try to implement this method
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	430 using their own knowledge of line breaking.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	431
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	432 \var{size}, if given, is passed as size argument to the stream's
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	433 \method{readline()} method.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	434 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	435
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	436 \begin{methoddesc}{readlines}{[sizehint]}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	437 Read all lines available on the input stream and return them as list
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	438 of lines.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	439
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	440 Line breaks are implemented using the codec's decoder method and are
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	441 included in the list entries.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	442
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	443 \var{sizehint}, if given, is passed as \var{size} argument to the
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	444 stream's \method{read()} method.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	445 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	446
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	447 \begin{methoddesc}{reset}{}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	448 Resets the codec buffers used for keeping state.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	449
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	450 Note that no stream repositioning should take place. This method is
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	451 primarily intended to be able to recover from decoding errors.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	452 \end{methoddesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	453
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	454 In addition to the above methods, the \class{StreamReader} must also
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	455 inherit all other methods and attribute from the underlying stream.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	456
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	457 The next two base classes are included for convenience. They are not
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	458 needed by the codec registry, but may provide useful in practice.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	459
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	460
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	461 \subsubsection{StreamReaderWriter Objects \label{stream-reader-writer}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	462
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	463 The \class{StreamReaderWriter} allows wrapping streams which work in
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	464 both read and write modes.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	465
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	466 The design is such that one can use the factory functions returned by
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	467 the \function{lookup()} function to construct the instance.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	468
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	469 \begin{classdesc}{StreamReaderWriter}{stream, Reader, Writer, errors}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	470 Creates a \class{StreamReaderWriter} instance.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	471 \var{stream} must be a file-like object.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	472 \var{Reader} and \var{Writer} must be factory functions or classes
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	473 providing the \class{StreamReader} and \class{StreamWriter} interface
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	474 resp.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	475 Error handling is done in the same way as defined for the
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	476 stream readers and writers.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	477 \end{classdesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	478
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	479 \class{StreamReaderWriter} instances define the combined interfaces of
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	480 \class{StreamReader} and \class{StreamWriter} classes. They inherit
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	481 all other methods and attribute from the underlying stream.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	482
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	483
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	484 \subsubsection{StreamRecoder Objects \label{stream-recoder-objects}}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	485
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	486 The \class{StreamRecoder} provide a frontend - backend view of
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	487 encoding data which is sometimes useful when dealing with different
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	488 encoding environments.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	489
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	490 The design is such that one can use the factory functions returned by
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	491 the \function{lookup()} function to construct the instance.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	492
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	493 \begin{classdesc}{StreamRecoder}{stream, encode, decode,
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	494 Reader, Writer, errors}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	495 Creates a \class{StreamRecoder} instance which implements a two-way
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	496 conversion: \var{encode} and \var{decode} work on the frontend (the
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	497 input to \method{read()} and output of \method{write()}) while
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	498 \var{Reader} and \var{Writer} work on the backend (reading and
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	499 writing to the stream).
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	500
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	501 You can use these objects to do transparent direct recodings from
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	502 e.g.\ Latin-1 to UTF-8 and back.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	503
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	504 \var{stream} must be a file-like object.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	505
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	506 \var{encode}, \var{decode} must adhere to the \class{Codec}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	507 interface, \var{Reader}, \var{Writer} must be factory functions or
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	508 classes providing objects of the the \class{StreamReader} and
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	509 \class{StreamWriter} interface respectively.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	510
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	511 \var{encode} and \var{decode} are needed for the frontend
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	512 translation, \var{Reader} and \var{Writer} for the backend
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	513 translation. The intermediate format used is determined by the two
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	514 sets of codecs, e.g. the Unicode codecs will use Unicode as
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	515 intermediate encoding.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	516
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	517 Error handling is done in the same way as defined for the
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	518 stream readers and writers.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	519 \end{classdesc}
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	520
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	521 \class{StreamRecoder} instances define the combined interfaces of
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	522 \class{StreamReader} and \class{StreamWriter} classes. They inherit
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	523 all other methods and attribute from the underlying stream.
b2892cbc63db Marc-Andre Lemburg <mal@lemburg.com>: Fred Drake <fdrake@acm.org> parents: 13696 diff changeset	524
26943 55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	525 \subsection{Standard Encodings}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	526
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	527 Python comes with a number of codecs builtin, either implemented as C
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	528 functions, or with dictionaries as mapping tables. The following table
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	529 lists the codecs by name, together with a few common aliases, and the
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	530 languages for which the encoding is likely used. Neither the list of
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	531 aliases nor the list of languages is meant to be exhaustive. Notice
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	532 that spelling alternatives that only differ in case or use a hyphen
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	533 instead of an underscore are also valid aliases.
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	534
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	535 Many of the character sets support the same languages. They vary in
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	536 individual characters (e.g. whether the EURO SIGN is supported or
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	537 not), and in the assignment of characters to code positions. For the
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	538 European languages in particular, the following variants typically
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	539 exist:
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	540
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	541 \begin{itemize}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	542 \item an ISO 8859 codeset
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	543 \item a Microsoft Windows code page, which is typically derived from
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	544 a 8859 codeset, but replaces control characters with additional
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	545 graphic characters
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	546 \item an IBM EBCDIC code page
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	547 \item an IBM PC code page, which is ASCII compatible
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	548 \end{itemize}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	549
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	550 \begin{longtableiii}{l\|l\|l}{textrm}{Codec}{Aliases}{Languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	551
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	552 \lineiii{ascii}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	553 {646, us-ascii}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	554 {English}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	555
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	556 \lineiii{cp037}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	557 {IBM037, IBM039}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	558 {English}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	559
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	560 \lineiii{cp424}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	561 {EBCDIC-CP-HE, IBM424}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	562 {Hebrew}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	563
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	564 \lineiii{cp437}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	565 {437, IBM437}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	566 {English}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	567
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	568 \lineiii{cp500}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	569 {EBCDIC-CP-BE, EBCDIC-CP-CH, IBM500}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	570 {Western Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	571
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	572 \lineiii{cp737}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	573 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	574 {Greek}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	575
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	576 \lineiii{cp775}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	577 {IBM775}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	578 {Baltic languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	579
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	580 \lineiii{cp850}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	581 {850, IBM850}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	582 {Western Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	583
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	584 \lineiii{cp852}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	585 {852, IBM852}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	586 {Central and Eastern Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	587
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	588 \lineiii{cp855}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	589 {855, IBM855}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	590 {Bulgarian, Byelorussian, Macedonian, Russian, Serbian}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	591
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	592 \lineiii{cp856}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	593 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	594 {Hebrew}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	595
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	596 \lineiii{cp857}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	597 {857, IBM857}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	598 {Turkish}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	599
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	600 \lineiii{cp860}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	601 {860, IBM860}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	602 {Portuguese}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	603
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	604 \lineiii{cp861}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	605 {861, CP-IS, IBM861}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	606 {Icelandic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	607
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	608 \lineiii{cp862}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	609 {862, IBM862}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	610 {Hebrew}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	611
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	612 \lineiii{cp863}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	613 {863, IBM863}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	614 {Canadian}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	615
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	616 \lineiii{cp864}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	617 {IBM864}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	618 {Arabic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	619
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	620 \lineiii{cp865}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	621 {865, IBM865}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	622 {Danish, Norwegian}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	623
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	624 \lineiii{cp869}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	625 {869, CP-GR, IBM869}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	626 {Greek}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	627
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	628 \lineiii{cp874}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	629 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	630 {Thai}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	631
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	632 \lineiii{cp875}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	633 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	634 {Greek}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	635
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	636 \lineiii{cp1006}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	637 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	638 {Urdu}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	639
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	640 \lineiii{cp1026}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	641 {ibm1026}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	642 {Turkish}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	643
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	644 \lineiii{cp1140}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	645 {ibm1140}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	646 {Western Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	647
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	648 \lineiii{cp1250}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	649 {windows-1250}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	650 {Central and Eastern Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	651
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	652 \lineiii{cp1251}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	653 {windows-1251}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	654 {Bulgarian, Byelorussian, Macedonian, Russian, Serbian}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	655
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	656 \lineiii{cp1252}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	657 {windows-1252}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	658 {Western Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	659
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	660 \lineiii{cp1253}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	661 {windows-1253}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	662 {Greek}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	663
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	664 \lineiii{cp1254}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	665 {windows-1254}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	666 {Turkish}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	667
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	668 \lineiii{cp1255}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	669 {windows-1255}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	670 {Hebrew}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	671
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	672 \lineiii{cp1256}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	673 {windows1256}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	674 {Arabic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	675
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	676 \lineiii{cp1257}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	677 {windows-1257}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	678 {Baltic languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	679
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	680 \lineiii{cp1258}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	681 {windows-1258}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	682 {Vietnamese}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	683
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	684 \lineiii{latin_1}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	685 {iso-8859-1, iso8859-1, 8859, cp819, latin, latin1, L1}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	686 {West Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	687
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	688 \lineiii{iso8859_2}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	689 {iso-8859-2, latin2, L2}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	690 {Central and Eastern Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	691
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	692 \lineiii{iso8859_3}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	693 {iso-8859-3, latin3, L3}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	694 {Esperanto, Maltese}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	695
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	696 \lineiii{iso8859_4}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	697 {iso-8859-4, latin4, L4}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	698 {Baltic languagues}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	699
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	700 \lineiii{iso8859_5}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	701 {iso-8859-5, cyrillic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	702 {Bulgarian, Byelorussian, Macedonian, Russian, Serbian}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	703
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	704 \lineiii{iso8859_6}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	705 {iso-8859-6, arabic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	706 {Arabic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	707
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	708 \lineiii{iso8859_7}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	709 {iso-8859-7, greek, greek8}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	710 {Greek}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	711
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	712 \lineiii{iso8859_8}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	713 {iso-8859-8, hebrew}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	714 {Hebrew}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	715
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	716 \lineiii{iso8859_9}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	717 {iso-8859-9, latin5, L5}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	718 {Turkish}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	719
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	720 \lineiii{iso8859_10}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	721 {iso-8859-10, latin6, L6}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	722 {Nordic languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	723
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	724 \lineiii{iso8859_13}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	725 {iso-8859-13}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	726 {Baltic languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	727
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	728 \lineiii{iso8859_14}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	729 {iso-8859-14, latin8, L8}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	730 {Celtic languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	731
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	732 \lineiii{iso8859_15}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	733 {iso-8859-15}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	734 {Western Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	735
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	736 \lineiii{koi8_r}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	737 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	738 {Russian}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	739
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	740 \lineiii{koi8_u}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	741 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	742 {Ukrainian}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	743
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	744 \lineiii{mac_cyrillic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	745 {maccyrillic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	746 {Bulgarian, Byelorussian, Macedonian, Russian, Serbian}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	747
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	748 \lineiii{mac_greek}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	749 {macgreek}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	750 {Greek}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	751
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	752 \lineiii{mac_iceland}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	753 {maciceland}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	754 {Icelandic}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	755
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	756 \lineiii{mac_latin2}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	757 {maclatin2, maccentraleurope}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	758 {Central and Eastern Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	759
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	760 \lineiii{mac_roman}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	761 {macroman}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	762 {Western Europe}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	763
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	764 \lineiii{mac_turkish}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	765 {macturkish}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	766 {Turkish}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	767
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	768 \lineiii{utf_16}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	769 {U16, utf16}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	770 {all languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	771
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	772 \lineiii{utf_16_be}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	773 {UTF-16BE}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	774 {all languages (BMP only)}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	775
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	776 \lineiii{utf_16_le}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	777 {UTF-16LE}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	778 {all languages (BMP only)}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	779
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	780 \lineiii{utf_7}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	781 {U7}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	782 {all languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	783
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	784 \lineiii{utf_8}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	785 {U8, UTF, utf8}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	786 {all languages}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	787
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	788 \end{longtableiii}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	789
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	790 A number of codecs are specific to Python, so their codec names have
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	791 no meaning outside Python. Some of them don't convert from Unicode
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	792 strings to byte strings, but instead use the property of the Python
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	793 codecs machinery that any bijective function with one argument can be
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	794 considered as an encoding.
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	795
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	796 For the codecs listed below, the result in the ``encoding'' direction
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	797 is always a byte string. The result of the ``decoding'' direction is
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	798 listed as operand type in the table.
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	799
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	800 \begin{tableiv}{l\|l\|l\|l}{textrm}{Codec}{Aliases}{Operand type}{Purpose}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	801
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	802 \lineiv{base64_codec}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	803 {base64, base-64}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	804 {byte string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	805 {Convert operand to MIME base64}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	806
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	807 \lineiv{hex_codec}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	808 {hex}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	809 {byte string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	810 {Convert operand to hexadecimal representation, with two digits per byte}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	811
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	812 \lineiv{mbcs}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	813 {dbcs}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	814 {Unicode string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	815 {Windows only: Encode operand according to the ANSI codepage (CP_ACP)}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	816
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	817 \lineiv{palmos}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	818 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	819 {Unicode string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	820 {Encoding of PalmOS 3.5}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	821
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	822 \lineiv{quopri_codec}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	823 {quopri, quoted-printable, quotedprintable}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	824 {byte string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	825 {Convert operand to MIME quoted printable}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	826
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	827 \lineiv{raw_unicode_escape}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	828 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	829 {Unicode string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	830 {Produce a string that is suitable as raw Unicode literal in Python source code}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	831
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	832 \lineiv{rot_13}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	833 {rot13}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	834 {byte string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	835 {Returns the Caesar-cypher encryption of the operand}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	836
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	837 \lineiv{string_escape}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	838 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	839 {byte string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	840 {Produce a string that is suitable as string literal in Python source code}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	841
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	842 \lineiv{undefined}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	843 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	844 {any}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	845 {Raise an exception for all conversion. Can be used as the system encoding if no automatic coercion between byte and Unicode strings is desired.}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	846
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	847 \lineiv{unicode_escape}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	848 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	849 {Unicode string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	850 {Produce a string that is suitable as Unicode literal in Python source code}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	851
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	852 \lineiv{unicode_internal}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	853 {}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	854 {Unicode string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	855 {Return the internal represenation of the operand}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	856
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	857 \lineiv{uu_codec}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	858 {uu}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	859 {byte string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	860 {Convert the operand using uuencode}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	861
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	862 \lineiv{zlib_codec}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	863 {zip, zlib}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	864 {byte string}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	865 {Compress the operand using gzip}
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	866
55141144dab5 Document standard encodings. Martin v. Löwis <martin@v.loewis.de> parents: 26294 diff changeset	867 \end{tableiv}

Mercurial > cpython-lru_cache-weakref

annotate Doc/lib/libcodecs.tex @ 28646:193b8aec00ce legacy-trunk