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author | Georg Brandl <georg@python.org> | 2008-07-23 16:10:53 (GMT) |
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committer | Georg Brandl <georg@python.org> | 2008-07-23 16:10:53 (GMT) |
commit | 3dbca81c9b7903e8d808089a6a76dc97807b3df3 (patch) | |
tree | a58e68eeadfebe5797dc830e3ce20352118174bb /Doc/tutorial | |
parent | 4f6f34fb0b7c1048b238062015f3fef7372a911f (diff) | |
download | cpython-3dbca81c9b7903e8d808089a6a76dc97807b3df3.zip cpython-3dbca81c9b7903e8d808089a6a76dc97807b3df3.tar.gz cpython-3dbca81c9b7903e8d808089a6a76dc97807b3df3.tar.bz2 |
Merged revisions 65012,65035,65037-65040,65048,65057,65077,65091-65095,65097-65099,65127-65128,65131,65133-65136,65139,65149-65151,65155,65158-65159,65176-65178,65183-65184,65187-65190,65192,65194 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r65012 | jesse.noller | 2008-07-16 15:24:06 +0200 (Wed, 16 Jul 2008) | 2 lines
Apply patch for issue 3090: ARCHFLAGS parsing incorrect
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r65035 | georg.brandl | 2008-07-16 23:19:28 +0200 (Wed, 16 Jul 2008) | 2 lines
#3045: fix pydoc behavior for TEMP path with spaces.
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r65037 | georg.brandl | 2008-07-16 23:31:41 +0200 (Wed, 16 Jul 2008) | 2 lines
#1608818: errno can get set by every call to readdir().
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r65038 | georg.brandl | 2008-07-17 00:04:20 +0200 (Thu, 17 Jul 2008) | 2 lines
#3305: self->stream can be NULL.
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r65039 | georg.brandl | 2008-07-17 00:09:17 +0200 (Thu, 17 Jul 2008) | 2 lines
#3345: fix docstring.
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r65040 | georg.brandl | 2008-07-17 00:33:18 +0200 (Thu, 17 Jul 2008) | 2 lines
#3312: fix two sqlite3 crashes.
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r65048 | georg.brandl | 2008-07-17 01:35:54 +0200 (Thu, 17 Jul 2008) | 2 lines
#3388: add a paragraph about using "with" for file objects.
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r65057 | gregory.p.smith | 2008-07-17 05:13:05 +0200 (Thu, 17 Jul 2008) | 2 lines
news note for r63052
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r65077 | jesse.noller | 2008-07-17 23:01:05 +0200 (Thu, 17 Jul 2008) | 3 lines
Fix issue 3395, update _debugInfo to be _debug_info
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r65091 | ronald.oussoren | 2008-07-18 07:48:03 +0200 (Fri, 18 Jul 2008) | 2 lines
Last bit of a fix for issue3381 (addon for my patch in r65061)
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r65092 | vinay.sajip | 2008-07-18 10:59:06 +0200 (Fri, 18 Jul 2008) | 1 line
Issue #3389: Allow resolving dotted names for handlers in logging configuration files. Thanks to Philip Jenvey for the patch.
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r65093 | vinay.sajip | 2008-07-18 11:00:00 +0200 (Fri, 18 Jul 2008) | 1 line
Issue #3389: Allow resolving dotted names for handlers in logging configuration files. Thanks to Philip Jenvey for the patch.
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r65094 | vinay.sajip | 2008-07-18 11:00:35 +0200 (Fri, 18 Jul 2008) | 1 line
Issue #3389: Allow resolving dotted names for handlers in logging configuration files. Thanks to Philip Jenvey for the patch.
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r65095 | vinay.sajip | 2008-07-18 11:01:10 +0200 (Fri, 18 Jul 2008) | 1 line
Issue #3389: Allow resolving dotted names for handlers in logging configuration files. Thanks to Philip Jenvey for the patch.
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r65097 | georg.brandl | 2008-07-18 12:20:59 +0200 (Fri, 18 Jul 2008) | 2 lines
Remove duplicate entry in __all__.
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r65098 | georg.brandl | 2008-07-18 12:29:30 +0200 (Fri, 18 Jul 2008) | 2 lines
Correct attribute name.
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r65099 | georg.brandl | 2008-07-18 13:15:06 +0200 (Fri, 18 Jul 2008) | 3 lines
Document the different meaning of precision for {:f} and {:g}.
Also document how inf and nan are formatted. #3404.
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r65127 | raymond.hettinger | 2008-07-19 02:42:03 +0200 (Sat, 19 Jul 2008) | 1 line
Improve accuracy of gamma test function
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r65128 | raymond.hettinger | 2008-07-19 02:43:00 +0200 (Sat, 19 Jul 2008) | 1 line
Add recipe to the itertools docs.
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r65131 | georg.brandl | 2008-07-19 12:08:55 +0200 (Sat, 19 Jul 2008) | 2 lines
#3378: in case of no memory, don't leak even more memory. :)
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r65133 | georg.brandl | 2008-07-19 14:39:10 +0200 (Sat, 19 Jul 2008) | 3 lines
#3302: fix segfaults when passing None for arguments that can't
be NULL for the C functions.
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r65134 | georg.brandl | 2008-07-19 14:46:12 +0200 (Sat, 19 Jul 2008) | 2 lines
#3303: fix crash with invalid Py_DECREF in strcoll().
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r65135 | georg.brandl | 2008-07-19 15:00:22 +0200 (Sat, 19 Jul 2008) | 3 lines
#3319: don't raise ZeroDivisionError if number of rounds is so
low that benchtime is zero.
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r65136 | georg.brandl | 2008-07-19 15:09:42 +0200 (Sat, 19 Jul 2008) | 3 lines
#3323: mention that if inheriting from a class without __slots__,
the subclass will have a __dict__ available too.
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r65139 | georg.brandl | 2008-07-19 15:48:44 +0200 (Sat, 19 Jul 2008) | 2 lines
Add ordering info for findall and finditer.
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r65149 | raymond.hettinger | 2008-07-20 01:21:57 +0200 (Sun, 20 Jul 2008) | 1 line
Fix compress() recipe in docs to use itertools.
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r65150 | raymond.hettinger | 2008-07-20 01:58:47 +0200 (Sun, 20 Jul 2008) | 1 line
Clean-up itertools docs and recipes.
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r65151 | gregory.p.smith | 2008-07-20 02:22:08 +0200 (Sun, 20 Jul 2008) | 9 lines
fix issue3120 - don't truncate handles on 64-bit Windows.
This is still messy, realistically PC/_subprocess.c should never cast pointers
to python numbers and back at all.
I don't have a 64-bit windows build environment because microsoft apparently
thinks that should cost money. Time to watch the buildbots. It builds and
passes tests on 32-bit windows.
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r65155 | georg.brandl | 2008-07-20 13:50:29 +0200 (Sun, 20 Jul 2008) | 2 lines
#926501: add info where to put the docstring.
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r65158 | neal.norwitz | 2008-07-20 21:35:23 +0200 (Sun, 20 Jul 2008) | 1 line
Fix a couple of names in error messages that were wrong
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r65159 | neal.norwitz | 2008-07-20 22:39:36 +0200 (Sun, 20 Jul 2008) | 1 line
Fix misspeeld method name (negative)
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r65176 | amaury.forgeotdarc | 2008-07-21 23:36:24 +0200 (Mon, 21 Jul 2008) | 4 lines
Increment version number in NEWS file, and move items that were added after 2.6b2.
(I thought there was a script to automate this kind of updates)
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r65177 | amaury.forgeotdarc | 2008-07-22 00:00:38 +0200 (Tue, 22 Jul 2008) | 5 lines
Issue2378: pdb would delete free variables when stepping into a class statement.
The problem was introduced by r53954, the correction is to restore the symmetry between
PyFrame_FastToLocals and PyFrame_LocalsToFast
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r65178 | benjamin.peterson | 2008-07-22 00:05:34 +0200 (Tue, 22 Jul 2008) | 1 line
don't use assert statement
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r65183 | ronald.oussoren | 2008-07-22 09:06:00 +0200 (Tue, 22 Jul 2008) | 2 lines
Fix buglet in fix for issue3381
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r65184 | ronald.oussoren | 2008-07-22 09:06:33 +0200 (Tue, 22 Jul 2008) | 2 lines
Fix build issue on OSX 10.4, somehow this wasn't committed before.
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r65187 | raymond.hettinger | 2008-07-22 20:54:02 +0200 (Tue, 22 Jul 2008) | 1 line
Remove out-of-date section on Exact/Inexact.
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r65188 | raymond.hettinger | 2008-07-22 21:00:47 +0200 (Tue, 22 Jul 2008) | 1 line
Tuples now have both count() and index().
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r65189 | raymond.hettinger | 2008-07-22 21:03:05 +0200 (Tue, 22 Jul 2008) | 1 line
Fix credits for math.sum()
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r65190 | raymond.hettinger | 2008-07-22 21:18:50 +0200 (Tue, 22 Jul 2008) | 1 line
One more attribution.
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r65192 | benjamin.peterson | 2008-07-23 01:44:37 +0200 (Wed, 23 Jul 2008) | 1 line
remove unneeded import
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r65194 | benjamin.peterson | 2008-07-23 15:25:06 +0200 (Wed, 23 Jul 2008) | 1 line
use isinstance
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Diffstat (limited to 'Doc/tutorial')
-rw-r--r-- | Doc/tutorial/inputoutput.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Doc/tutorial/inputoutput.rst b/Doc/tutorial/inputoutput.rst index cc2a392..cbca95b 100644 --- a/Doc/tutorial/inputoutput.rst +++ b/Doc/tutorial/inputoutput.rst @@ -355,6 +355,16 @@ attempts to use the file object will automatically fail. :: File "<stdin>", line 1, in ? ValueError: I/O operation on closed file +It is good practice to use the :keyword:`with` keyword when dealing with file +objects. This has the advantage that the file is properly closed after its +suite finishes, even if an exception is raised on the way. It is also much +shorter than writing equivalent :keyword:`try`\ -\ :keyword:`finally` blocks:: + + >>> with open('/tmp/workfile', 'r') as f: + ... read_data = f.read() + >>> f.closed + True + File objects have some additional methods, such as :meth:`isatty` and :meth:`truncate` which are less frequently used; consult the Library Reference for a complete guide to file objects. |