cpython-lru_cache-weakref: Lib/code.py annotate

annotate Lib/code.py @ 8831:00a6bb65ff29 legacy-trunk

Getting rid of this ancient stuff.

author	Guido van Rossum <guido@python.org>
date	Wed, 05 Aug 1998 21:10:09 +0000
parents	e951bf2d7d93
children	0329d419e506

rev	line source
5835 b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	1 """Utilities dealing with code objects."""
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	2
8543 e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	3 import sys
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	4 import string
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	5 import traceback
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	6
5835 b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	7 def compile_command(source, filename="<input>", symbol="single"):
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	8 r"""Compile a command and determine whether it is incomplete.
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	9
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	10 Arguments:
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	11
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	12 source -- the source string; may contain \n characters
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	13 filename -- optional filename from which source was read; default "<input>"
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	14 symbol -- optional grammar start symbol; "single" (default) or "eval"
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	15
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	16 Return value / exception raised:
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	17
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	18 - Return a code object if the command is complete and valid
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	19 - Return None if the command is incomplete
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	20 - Raise SyntaxError if the command is a syntax error
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	21
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	22 Approach:
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	23
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	24 Compile three times: as is, with \n, and with \n\n appended. If
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	25 it compiles as is, it's complete. If it compiles with one \n
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	26 appended, we expect more. If it doesn't compile either way, we
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	27 compare the error we get when compiling with \n or \n\n appended.
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	28 If the errors are the same, the code is broken. But if the errors
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	29 are different, we expect more. Not intuitive; not even guaranteed
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	30 to hold in future releases; but this matches the compiler's
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	31 behavior in Python 1.4 and 1.5.
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	32
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	33 """
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	34
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	35 err = err1 = err2 = None
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	36 code = code1 = code2 = None
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	37
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	38 try:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	39 code = compile(source, filename, symbol)
5835 b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	40 except SyntaxError, err:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	41 pass
5835 b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	42
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	43 try:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	44 code1 = compile(source + "\n", filename, symbol)
5835 b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	45 except SyntaxError, err1:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	46 pass
5835 b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	47
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	48 try:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	49 code2 = compile(source + "\n\n", filename, symbol)
5835 b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	50 except SyntaxError, err2:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	51 pass
5835 b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	52
b9063f6f811c Checking in new module code.py -- utilities dealing with code objects. Guido van Rossum <guido@python.org> parents: diff changeset	53 if code:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	54 return code
7097 00a85ab0337f Seems I've found a way to fix this. Guido van Rossum <guido@python.org> parents: 6423 diff changeset	55 try:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	56 e1 = err1.__dict__
7097 00a85ab0337f Seems I've found a way to fix this. Guido van Rossum <guido@python.org> parents: 6423 diff changeset	57 except AttributeError:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	58 e1 = err1
7097 00a85ab0337f Seems I've found a way to fix this. Guido van Rossum <guido@python.org> parents: 6423 diff changeset	59 try:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	60 e2 = err2.__dict__
7097 00a85ab0337f Seems I've found a way to fix this. Guido van Rossum <guido@python.org> parents: 6423 diff changeset	61 except AttributeError:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	62 e2 = err2
7097 00a85ab0337f Seems I've found a way to fix this. Guido van Rossum <guido@python.org> parents: 6423 diff changeset	63 if not code1 and e1 == e2:
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	64 raise SyntaxError, err1
6423 644484e1a37b Add Jeff Epler's interact() function. Note that it is broken. Guido van Rossum <guido@python.org> parents: 5835 diff changeset	65
644484e1a37b Add Jeff Epler's interact() function. Note that it is broken. Guido van Rossum <guido@python.org> parents: 5835 diff changeset	66
8543 e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	67 class InteractiveConsole:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	68 """Closely emulate the behavior of the interactive Python interpreter.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	69
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	70 After code by Jeff Epler and Fredrik Lundh.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	71 """
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	72
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	73 def __init__(self, filename="<console>", locals=None):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	74 """Constructor.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	75
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	76 The optional filename argument specifies the (file)name of the
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	77 input stream; it will show up in tracebacks. It defaults to
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	78 '<console>'.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	79
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	80 """
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	81 self.filename = filename
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	82 if locals is None:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	83 locals = {}
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	84 self.locals = locals
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	85 self.resetbuffer()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	86
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	87 def resetbuffer(self):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	88 """Reset the input buffer (but not the variables!)."""
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	89 self.buffer = []
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	90
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	91 def interact(self, banner=None):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	92 """Closely emulate the interactive Python console."""
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	93 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	94 sys.ps1
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	95 except AttributeError:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	96 sys.ps1 = ">>> "
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	97 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	98 sys.ps2
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	99 except AttributeError:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	100 sys.ps2 = "... "
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	101 if banner is None:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	102 self.write("Python %s on %s\n%s\n(%s)\n" %
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	103 (sys.version, sys.platform, sys.copyright,
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	104 self.__class__.__name__))
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	105 else:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	106 self.write("%s\n" % str(banner))
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	107 more = 0
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	108 while 1:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	109 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	110 if more:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	111 prompt = sys.ps2
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	112 else:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	113 prompt = sys.ps1
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	114 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	115 line = self.raw_input(prompt)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	116 except EOFError:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	117 self.write("\n")
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	118 break
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	119 else:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	120 more = self.push(line)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	121 except KeyboardInterrupt:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	122 self.write("\nKeyboardInterrupt\n")
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	123 self.resetbuffer()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	124 more = 0
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	125
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	126 def push(self, line):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	127 """Push a line to the interpreter.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	128
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	129 The line should not have a trailing newline.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	130
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	131 One of three things will happen:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	132
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	133 1) The input is incorrect; compile_command() raised
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	134 SyntaxError. A syntax traceback will be printed.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	135
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	136 2) The input is incomplete, and more input is required;
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	137 compile_command() returned None.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	138
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	139 3) The input is complete; compile_command() returned a code
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	140 object. The code is executed. When an exception occurs, a
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	141 traceback is printed. All exceptions are caught except
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	142 SystemExit, which is reraised.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	143
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	144 The return value is 1 in case 2, 0 in the other cases. (The
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	145 return value can be used to decide whether to use sys.ps1 or
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	146 sys.ps2 to prompt the next line.)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	147
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	148 A note about KeyboardInterrupt: this exception may occur
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	149 elsewhere in this code, and will not always be caught. The
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	150 caller should be prepared to deal with it.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	151
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	152 """
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	153 self.buffer.append(line)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	154
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	155 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	156 x = compile_command(string.join(self.buffer, "\n"),
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	157 filename=self.filename)
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	158 except SyntaxError:
8543 e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	159 # Case 1
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	160 self.showsyntaxerror()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	161 self.resetbuffer()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	162 return 0
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	163
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	164 if x is None:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	165 # Case 2
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	166 return 1
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	167
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	168 # Case 3
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	169 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	170 exec x in self.locals
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	171 except SystemExit:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	172 raise
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	173 except:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	174 self.showtraceback()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	175 self.resetbuffer()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	176 return 0
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	177
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	178 def showsyntaxerror(self):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	179 """Display the syntax error that just occurred.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	180
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	181 This doesn't display a stack trace because there isn't one.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	182
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	183 The output is written by self.write(), below.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	184
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	185 """
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	186 type, value = sys.exc_info()[:2]
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	187 # Work hard to stuff the correct filename in the exception
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	188 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	189 msg, (filename, lineno, offset, line) = value
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	190 except:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	191 pass
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	192 else:
8543 e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	193 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	194 value = SyntaxError(msg, (self.filename, lineno, offset, line))
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	195 except:
8543 e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	196 value = msg, (self.filename, lineno, offset, line)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	197 list = traceback.format_exception_only(type, value)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	198 map(self.write, list)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	199
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	200 def showtraceback(self):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	201 """Display the exception that just occurred.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	202
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	203 We remove the first stack item because it is our own code.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	204
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	205 The output is written by self.write(), below.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	206
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	207 """
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	208 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	209 type, value, tb = sys.exc_info()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	210 tblist = traceback.extract_tb(tb)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	211 del tblist[0]
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	212 list = traceback.format_list(tblist)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	213 list[len(list):] = traceback.format_exception_only(type, value)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	214 finally:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	215 tblist = tb = None
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	216 map(self.write, list)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	217
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	218 def write(self, data):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	219 """Write a string.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	220
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	221 The base implementation writes to sys.stderr; a subclass may
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	222 replace this with a different implementation.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	223
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	224 """
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	225 sys.stderr.write(data)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	226
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	227 def raw_input(self, prompt=""):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	228 """Write a prompt and read a line.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	229
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	230 The returned line does not include the trailing newline.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	231 When the user enters the EOF key sequence, EOFError is raised.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	232
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	233 The base implementation uses the built-in function
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	234 raw_input(); a subclass may replace this with a different
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	235 implementation.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	236
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	237 """
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	238 return raw_input(prompt)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	239
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	240
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	241 def interact(banner=None, readfunc=None, locals=None):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	242 """Closely emulate the interactive Python interpreter.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	243
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	244 This is a backwards compatible interface to the InteractiveConsole
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	245 class. It attempts to import the readline module to enable GNU
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	246 readline if it is available.
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	247
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	248 Arguments (all optional, all default to None):
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	249
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	250 banner -- passed to InteractiveConsole.interact()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	251 readfunc -- if not None, replaces InteractiveConsole.raw_input()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	252 locals -- passed to InteractiveConsole.__init__()
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	253
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	254 """
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	255 try:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	256 import readline
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	257 except:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	258 pass
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	259 console = InteractiveConsole(locals=locals)
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	260 if readfunc is not None:
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	261 console.raw_input = readfunc
e951bf2d7d93 Subsume the interact() function in a class. This should make it Guido van Rossum <guido@python.org> parents: 7755 diff changeset	262 console.interact(banner)
7755 fb4b4d069cc7 Mass check-in after untabifying all files that need it. Guido van Rossum <guido@python.org> parents: 7097 diff changeset	263
6423 644484e1a37b Add Jeff Epler's interact() function. Note that it is broken. Guido van Rossum <guido@python.org> parents: 5835 diff changeset	264 if __name__ == '__main__':
644484e1a37b Add Jeff Epler's interact() function. Note that it is broken. Guido van Rossum <guido@python.org> parents: 5835 diff changeset	265 interact()

Mercurial > cpython-lru_cache-weakref

annotate Lib/code.py @ 8831:00a6bb65ff29 legacy-trunk