diff Doc/tutorial/classes.rst @ 66472:a9f0ec604c8a 3.1

Merged revisions 85572-85573,85606,85609-85622,85624,85626-85627,85629,85631,85633,85635-85636,85638-85639,85641-85642 via svnmerge from svn+ssh://svn.python.org/python/branches/py3k ........ r85572 | georg.brandl | 2010-10-16 20:51:05 +0200 (Sa, 16 Okt 2010) | 1 line #10122: typo fix. ........ r85573 | georg.brandl | 2010-10-16 20:53:08 +0200 (Sa, 16 Okt 2010) | 1 line #10124: typo fix. ........ r85606 | georg.brandl | 2010-10-17 08:32:59 +0200 (So, 17 Okt 2010) | 1 line #10058: tweak wording about exception returns. ........ r85609 | georg.brandl | 2010-10-17 11:19:03 +0200 (So, 17 Okt 2010) | 1 line #8556: use less confusing mapping key in example. ........ r85610 | georg.brandl | 2010-10-17 11:23:05 +0200 (So, 17 Okt 2010) | 1 line #8686: remove potentially confusing wording that does not add any value. ........ r85611 | georg.brandl | 2010-10-17 11:33:24 +0200 (So, 17 Okt 2010) | 1 line #8811: small fixes to sqlite3 docs. ........ r85612 | georg.brandl | 2010-10-17 11:37:54 +0200 (So, 17 Okt 2010) | 1 line #8855: add shelve security warning. ........ r85613 | georg.brandl | 2010-10-17 11:43:35 +0200 (So, 17 Okt 2010) | 1 line Fix hmac docs: it takes and returns bytes, except for hexdigest(). ........ r85614 | georg.brandl | 2010-10-17 11:46:11 +0200 (So, 17 Okt 2010) | 1 line #8968: add actual name of token constants. ........ r85615 | georg.brandl | 2010-10-17 12:05:13 +0200 (So, 17 Okt 2010) | 1 line #459007: merge info from PC/getpathp.c and using/windows.rst to document the forming of sys.path under Windows. ........ r85616 | georg.brandl | 2010-10-17 12:07:29 +0200 (So, 17 Okt 2010) | 1 line Fix copy-paste error in example. ........ r85617 | georg.brandl | 2010-10-17 12:09:06 +0200 (So, 17 Okt 2010) | 1 line #5212: md5 weaknesses do not affect hmac, so remove the note about that. ........ r85618 | georg.brandl | 2010-10-17 12:14:38 +0200 (So, 17 Okt 2010) | 1 line #9086: correct wrong terminology about linking with pythonXY.dll. ........ r85619 | georg.brandl | 2010-10-17 12:15:50 +0200 (So, 17 Okt 2010) | 1 line Make file names consistent. ........ r85620 | georg.brandl | 2010-10-17 12:22:28 +0200 (So, 17 Okt 2010) | 1 line Remove second parser module example; it referred to non-readily-available example files, and this kind of discovery is much better done with the AST nowadays anyway. ........ r85621 | georg.brandl | 2010-10-17 12:24:54 +0200 (So, 17 Okt 2010) | 1 line #9105: move pickle warning to a bit more prominent location. ........ r85622 | georg.brandl | 2010-10-17 12:28:04 +0200 (So, 17 Okt 2010) | 1 line #9112: document error() and exit() methods of ArgumentParser. ........ r85624 | georg.brandl | 2010-10-17 12:34:28 +0200 (So, 17 Okt 2010) | 1 line Some markup and style fixes in argparse docs. ........ r85626 | georg.brandl | 2010-10-17 12:38:20 +0200 (So, 17 Okt 2010) | 1 line #9117: fix syntax for class definition. ........ r85627 | georg.brandl | 2010-10-17 12:44:11 +0200 (So, 17 Okt 2010) | 1 line #9138: reword introduction to classes in Python. ........ r85629 | georg.brandl | 2010-10-17 12:51:45 +0200 (So, 17 Okt 2010) | 1 line #5962: clarify sys.exit() vs. threads. ........ r85631 | georg.brandl | 2010-10-17 12:53:54 +0200 (So, 17 Okt 2010) | 1 line Fix capitalization. ........ r85633 | georg.brandl | 2010-10-17 12:59:41 +0200 (So, 17 Okt 2010) | 1 line #9204: remove mentions of removed types in the types module. ........ r85635 | georg.brandl | 2010-10-17 13:03:22 +0200 (So, 17 Okt 2010) | 1 line #5121: fix claims about default values leading to segfaults. ........ r85636 | georg.brandl | 2010-10-17 13:06:14 +0200 (So, 17 Okt 2010) | 1 line #9237: document sys.call_tracing(). ........ r85638 | georg.brandl | 2010-10-17 13:13:37 +0200 (So, 17 Okt 2010) | 1 line Port changes to pickle docs apparently lost in py3k. ........ r85639 | georg.brandl | 2010-10-17 13:23:56 +0200 (So, 17 Okt 2010) | 1 line Make twisted example a bit more logical. ........ r85641 | georg.brandl | 2010-10-17 13:29:07 +0200 (So, 17 Okt 2010) | 1 line Fix documentation of dis.opmap direction. ........ r85642 | georg.brandl | 2010-10-17 13:36:28 +0200 (So, 17 Okt 2010) | 1 line #9730: fix example. ........
author Georg Brandl <georg@python.org>
date Fri, 26 Nov 2010 08:49:15 +0000
parents 90e1735df4d9
children 3c9232a684ae
line wrap: on
line diff
--- a/Doc/tutorial/classes.rst	Fri Nov 26 08:44:18 2010 +0000
+++ b/Doc/tutorial/classes.rst	Fri Nov 26 08:49:15 2010 +0000
@@ -4,26 +4,26 @@
 Classes
 *******
 
-Python's class mechanism adds classes to the language with a minimum of new
-syntax and semantics.  It is a mixture of the class mechanisms found in C++ and
-Modula-3.  As is true for modules, classes in Python do not put an absolute
-barrier between definition and user, but rather rely on the politeness of the
-user not to "break into the definition."  The most important features of classes
-are retained with full power, however: the class inheritance mechanism allows
+Compared with other programming languages, Python's class mechanism adds classes
+with a minimum of new syntax and semantics.  It is a mixture of the class
+mechanisms found in C++ and Modula-3.  Python classes provide all the standard
+features of Object Oriented Programming: the class inheritance mechanism allows
 multiple base classes, a derived class can override any methods of its base
 class or classes, and a method can call the method of a base class with the same
-name.  Objects can contain an arbitrary amount of data.
+name.  Objects can contain arbitrary amounts and kinds of data.  As is true for
+modules, classes partake of the dynamic nature of Python: they are created at
+runtime, and can be modified further after creation.
 
 In C++ terminology, normally class members (including the data members) are
-*public* (except see below :ref:`tut-private`),
-and all member functions are *virtual*.  As in Modula-3, there are no shorthands
-for referencing the object's members from its methods: the method function is
-declared with an explicit first argument representing the object, which is
-provided implicitly by the call.  As in Smalltalk, classes themselves are
-objects.  This provides semantics for importing and renaming.  Unlike C++ and
-Modula-3, built-in types can be used as base classes for extension by the user.
-Also, like in C++, most built-in operators with special syntax (arithmetic
-operators, subscripting etc.) can be redefined for class instances.
+*public* (except see below :ref:`tut-private`), and all member functions are
+*virtual*.  As in Modula-3, there are no shorthands for referencing the object's
+members from its methods: the method function is declared with an explicit first
+argument representing the object, which is provided implicitly by the call.  As
+in Smalltalk, classes themselves are objects.  This provides semantics for
+importing and renaming.  Unlike C++ and Modula-3, built-in types can be used as
+base classes for extension by the user.  Also, like in C++, most built-in
+operators with special syntax (arithmetic operators, subscripting etc.) can be
+redefined for class instances.
 
 (Lacking universally accepted terminology to talk about classes, I will make
 occasional use of Smalltalk and C++ terms.  I would use Modula-3 terms, since