Mercurial > cpython-lru_cache-weakref

annotate Lib/contextlib.py @ 44685:e511ccf2ffbe legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Tighten the definition of a named tuple.
author Raymond Hettinger <python@rcn.com>
date Tue, 15 Jan 2008 03:07:42 +0000
parents c4624dc0d41b
children 1423834b72d8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
1 """Utilities for with-statement contexts. See PEP 343."""
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
2
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
3 import sys
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
4
38101
6bc1e83a97a6 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
Nick Coghlan <ncoghlan@gmail.com>
parents: 38084
diff changeset
5 __all__ = ["contextmanager", "nested", "closing"]
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
6
38101
6bc1e83a97a6 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
Nick Coghlan <ncoghlan@gmail.com>
parents: 38084
diff changeset
7 class GeneratorContextManager(object):
6bc1e83a97a6 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
Nick Coghlan <ncoghlan@gmail.com>
parents: 38084
diff changeset
8 """Helper for @contextmanager decorator."""
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
9
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
10 def __init__(self, gen):
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
11 self.gen = gen
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
12
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
13 def __enter__(self):
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
14 try:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
15 return self.gen.next()
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
16 except StopIteration:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
17 raise RuntimeError("generator didn't yield")
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
18
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
19 def __exit__(self, type, value, traceback):
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
20 if type is None:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
21 try:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
22 self.gen.next()
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
23 except StopIteration:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
24 return
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
25 else:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
26 raise RuntimeError("generator didn't stop")
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
27 else:
43749
c4624dc0d41b Fix for bug 1705170 - contextmanager swallowing StopIteration (2.5 backport candidate)
Nick Coghlan <ncoghlan@gmail.com>
parents: 42737
diff changeset
28 if value is None:
c4624dc0d41b Fix for bug 1705170 - contextmanager swallowing StopIteration (2.5 backport candidate)
Nick Coghlan <ncoghlan@gmail.com>
parents: 42737
diff changeset
29 # Need to force instantiation so we can reliably
c4624dc0d41b Fix for bug 1705170 - contextmanager swallowing StopIteration (2.5 backport candidate)
Nick Coghlan <ncoghlan@gmail.com>
parents: 42737
diff changeset
30 # tell if we get the same exception back
c4624dc0d41b Fix for bug 1705170 - contextmanager swallowing StopIteration (2.5 backport candidate)
Nick Coghlan <ncoghlan@gmail.com>
parents: 42737
diff changeset
31 value = type()
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
32 try:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
33 self.gen.throw(type, value, traceback)
37203
b39c3d7a5ad4 Fix a problem with @contextmanager not detecting a broken generator
Phillip J. Eby <pje@telecommunity.com>
parents: 36926
diff changeset
34 raise RuntimeError("generator didn't stop after throw()")
37565
8094cc0c98d7 Minor clarity edit to contextlib per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37449
diff changeset
35 except StopIteration, exc:
37449
5aa3cef4a8a7 Fix typos; enhance comments on patch for SF #1462485.
Phillip J. Eby <pje@telecommunity.com>
parents: 37446
diff changeset
36 # Suppress the exception *unless* it's the same exception that
5aa3cef4a8a7 Fix typos; enhance comments on patch for SF #1462485.
Phillip J. Eby <pje@telecommunity.com>
parents: 37446
diff changeset
37 # was passed to throw(). This prevents a StopIteration
5aa3cef4a8a7 Fix typos; enhance comments on patch for SF #1462485.
Phillip J. Eby <pje@telecommunity.com>
parents: 37446
diff changeset
38 # raised inside the "with" statement from being suppressed
37565
8094cc0c98d7 Minor clarity edit to contextlib per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37449
diff changeset
39 return exc is not value
37203
b39c3d7a5ad4 Fix a problem with @contextmanager not detecting a broken generator
Phillip J. Eby <pje@telecommunity.com>
parents: 36926
diff changeset
40 except:
37206
51df994885e9 More extensive comment on __exit__ handling, per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37203
diff changeset
41 # only re-raise if it's *not* the exception that was
51df994885e9 More extensive comment on __exit__ handling, per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37203
diff changeset
42 # passed to throw(), because __exit__() must not raise
51df994885e9 More extensive comment on __exit__ handling, per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37203
diff changeset
43 # an exception unless __exit__() itself failed. But throw()
51df994885e9 More extensive comment on __exit__ handling, per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37203
diff changeset
44 # has to raise the exception to signal propagation, so this
51df994885e9 More extensive comment on __exit__ handling, per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37203
diff changeset
45 # fixes the impedance mismatch between the throw() protocol
51df994885e9 More extensive comment on __exit__ handling, per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37203
diff changeset
46 # and the __exit__() protocol.
51df994885e9 More extensive comment on __exit__ handling, per Guido's request.
Phillip J. Eby <pje@telecommunity.com>
parents: 37203
diff changeset
47 #
37203
b39c3d7a5ad4 Fix a problem with @contextmanager not detecting a broken generator
Phillip J. Eby <pje@telecommunity.com>
parents: 36926
diff changeset
48 if sys.exc_info()[1] is not value:
b39c3d7a5ad4 Fix a problem with @contextmanager not detecting a broken generator
Phillip J. Eby <pje@telecommunity.com>
parents: 36926
diff changeset
49 raise
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
50
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
51
38101
6bc1e83a97a6 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
Nick Coghlan <ncoghlan@gmail.com>
parents: 38084
diff changeset
52 def contextmanager(func):
6bc1e83a97a6 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
Nick Coghlan <ncoghlan@gmail.com>
parents: 38084
diff changeset
53 """@contextmanager decorator.
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
54
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
55 Typical usage:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
56
38101
6bc1e83a97a6 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
Nick Coghlan <ncoghlan@gmail.com>
parents: 38084
diff changeset
57 @contextmanager
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
58 def some_generator(<arguments>):
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
59 <setup>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
60 try:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
61 yield <value>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
62 finally:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
63 <cleanup>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
64
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
65 This makes this:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
66
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
67 with some_generator(<arguments>) as <variable>:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
68 <body>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
69
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
70 equivalent to this:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
71
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
72 <setup>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
73 try:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
74 <variable> = <value>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
75 <body>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
76 finally:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
77 <cleanup>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
78
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
79 """
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
80 def helper(*args, **kwds):
38101
6bc1e83a97a6 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
Nick Coghlan <ncoghlan@gmail.com>
parents: 38084
diff changeset
81 return GeneratorContextManager(func(*args, **kwds))
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
82 try:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
83 helper.__name__ = func.__name__
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
84 helper.__doc__ = func.__doc__
37257
034c0cf5007b Fix contextlib not copying function attributes
Phillip J. Eby <pje@telecommunity.com>
parents: 37206
diff changeset
85 helper.__dict__ = func.__dict__
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
86 except:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
87 pass
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
88 return helper
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
89
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
90
38101
6bc1e83a97a6 Finish bringing SVN into line with latest version of PEP 343 by getting rid of all remaining references to context objects that I could find. Without a __context__() method context objects no longer exist. Also get test_with working again, and adopt a suggestion from Neal for decimal.Context.get_manager()
Nick Coghlan <ncoghlan@gmail.com>
parents: 38084
diff changeset
91 @contextmanager
38084
a812d0fae74a Get rid of __context__, per the latest changes to PEP 343 and python-dev
Guido van Rossum <guido@python.org>
parents: 38045
diff changeset
92 def nested(*managers):
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
93 """Support multiple context managers in a single with-statement.
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
94
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
95 Code like this:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
96
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
97 with nested(A, B, C) as (X, Y, Z):
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
98 <body>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
99
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
100 is equivalent to this:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
101
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
102 with A as X:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
103 with B as Y:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
104 with C as Z:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
105 <body>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
106
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
107 """
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
108 exits = []
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
109 vars = []
36926
fc10ff322df1 Um, I thought I'd already checked this in.
Guido van Rossum <guido@python.org>
parents: 36770
diff changeset
110 exc = (None, None, None)
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
111 try:
42737
adb83f4ac4cb Use try-except-finally in contextlib.
Georg Brandl <georg@python.org>
parents: 38101
diff changeset
112 for mgr in managers:
adb83f4ac4cb Use try-except-finally in contextlib.
Georg Brandl <georg@python.org>
parents: 38101
diff changeset
113 exit = mgr.__exit__
adb83f4ac4cb Use try-except-finally in contextlib.
Georg Brandl <georg@python.org>
parents: 38101
diff changeset
114 enter = mgr.__enter__
adb83f4ac4cb Use try-except-finally in contextlib.
Georg Brandl <georg@python.org>
parents: 38101
diff changeset
115 vars.append(enter())
adb83f4ac4cb Use try-except-finally in contextlib.
Georg Brandl <georg@python.org>
parents: 38101
diff changeset
116 exits.append(exit)
adb83f4ac4cb Use try-except-finally in contextlib.
Georg Brandl <georg@python.org>
parents: 38101
diff changeset
117 yield vars
adb83f4ac4cb Use try-except-finally in contextlib.
Georg Brandl <georg@python.org>
parents: 38101
diff changeset
118 except:
adb83f4ac4cb Use try-except-finally in contextlib.
Georg Brandl <georg@python.org>
parents: 38101
diff changeset
119 exc = sys.exc_info()
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
120 finally:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
121 while exits:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
122 exit = exits.pop()
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
123 try:
36926
fc10ff322df1 Um, I thought I'd already checked this in.
Guido van Rossum <guido@python.org>
parents: 36770
diff changeset
124 if exit(*exc):
fc10ff322df1 Um, I thought I'd already checked this in.
Guido van Rossum <guido@python.org>
parents: 36770
diff changeset
125 exc = (None, None, None)
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
126 except:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
127 exc = sys.exc_info()
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
128 if exc != (None, None, None):
37955
adb10afda55b Fix contextlib.nested to cope with exit methods raising and handling exceptions
Nick Coghlan <ncoghlan@gmail.com>
parents: 37565
diff changeset
129 # Don't rely on sys.exc_info() still containing
adb10afda55b Fix contextlib.nested to cope with exit methods raising and handling exceptions
Nick Coghlan <ncoghlan@gmail.com>
parents: 37565
diff changeset
130 # the right information. Another exception may
adb10afda55b Fix contextlib.nested to cope with exit methods raising and handling exceptions
Nick Coghlan <ncoghlan@gmail.com>
parents: 37565
diff changeset
131 # have been raised and caught by an exit method
adb10afda55b Fix contextlib.nested to cope with exit methods raising and handling exceptions
Nick Coghlan <ncoghlan@gmail.com>
parents: 37565
diff changeset
132 raise exc[0], exc[1], exc[2]
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
133
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
134
37971
af44db2a9523 Move the PEP 343 documentation and implementation closer to the
Nick Coghlan <ncoghlan@gmail.com>
parents: 37955
diff changeset
135 class closing(object):
af44db2a9523 Move the PEP 343 documentation and implementation closer to the
Nick Coghlan <ncoghlan@gmail.com>
parents: 37955
diff changeset
136 """Context to automatically close something at the end of a block.
36737
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
137
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
138 Code like this:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
139
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
140 with closing(<module>.open(<arguments>)) as f:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
141 <block>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
142
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
143 is equivalent to this:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
144
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
145 f = <module>.open(<arguments>)
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
146 try:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
147 <block>
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
148 finally:
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
149 f.close()
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
150
fa92fe15251a Updates to the with-statement:
Guido van Rossum <guido@python.org>
parents:
diff changeset
151 """
37971
af44db2a9523 Move the PEP 343 documentation and implementation closer to the
Nick Coghlan <ncoghlan@gmail.com>
parents: 37955
diff changeset
152 def __init__(self, thing):
af44db2a9523 Move the PEP 343 documentation and implementation closer to the
Nick Coghlan <ncoghlan@gmail.com>
parents: 37955
diff changeset
153 self.thing = thing
af44db2a9523 Move the PEP 343 documentation and implementation closer to the
Nick Coghlan <ncoghlan@gmail.com>
parents: 37955
diff changeset
154 def __enter__(self):
af44db2a9523 Move the PEP 343 documentation and implementation closer to the
Nick Coghlan <ncoghlan@gmail.com>
parents: 37955
diff changeset
155 return self.thing
af44db2a9523 Move the PEP 343 documentation and implementation closer to the
Nick Coghlan <ncoghlan@gmail.com>
parents: 37955
diff changeset
156 def __exit__(self, *exc_info):
af44db2a9523 Move the PEP 343 documentation and implementation closer to the
Nick Coghlan <ncoghlan@gmail.com>
parents: 37955
diff changeset
157 self.thing.close()