[Python-checkins] r87114 - python/branches/py3k/Doc/whatsnew/3.2.rst
raymond.hettinger
python-checkins at python.org
Tue Dec 7 10:37:11 CET 2010
Author: raymond.hettinger
Date: Tue Dec 7 10:37:11 2010
New Revision: 87114
Log:
Clean-ups and examples.
Modified:
python/branches/py3k/Doc/whatsnew/3.2.rst
Modified: python/branches/py3k/Doc/whatsnew/3.2.rst
==============================================================================
--- python/branches/py3k/Doc/whatsnew/3.2.rst (original)
+++ python/branches/py3k/Doc/whatsnew/3.2.rst Tue Dec 7 10:37:11 2010
@@ -472,14 +472,10 @@
produce various issues, especially under Windows. Here is an example
of enabling the warning from the command line::
- $ ./python -Wdefault
- Python 3.2a3+ (py3k, Nov 5 2010, 22:58:04)
- [GCC 4.4.3] on linux2
- Type "help", "copyright", "credits" or "license" for more information.
+ $ ./python -q -Wdefault
>>> f = open("foo", "wb")
>>> del f
__main__:1: ResourceWarning: unclosed file <_io.BufferedWriter name='foo'>
- >>>
(Added by Antoine Pitrou and Georg Brandl in :issue:`10093` and :issue:`477863`.)
@@ -541,7 +537,7 @@
(By Nick Coghlan and Terrence Cole; :issue:`9567`, :issue:`3445`, and
:issue:`8814`.)
-* The :mod:`itertools` module has a new function, :func:`~itertools.accumulate`
+* The :mod:`itertools` module has a new :func:`~itertools.accumulate` function
modeled on APL's *scan* operator and on Numpy's *accumulate* function:
>>> list(accumulate(8, 2, 50))
@@ -577,7 +573,12 @@
in favor of a plain :keyword:`with` statement which can accept multiple
context managers. The latter technique is faster (because it is built-in),
and it does a better job finalizing multiple context managers when one of them
- raises an exception.
+ raises an exception::
+
+ >>> with open('mylog.txt') as infile, open('a.out', 'w') as outfile:
+ ... for line in infile:
+ ... if '<critical>' in line:
+ ... outfile.write(line)
(Contributed by Georg Brandl and Mattias Brändström;
`appspot issue 53094 <http://codereview.appspot.com/53094>`_.)
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