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Code Issues Releases Wiki Activity

Clean-ups and examples.

This commit is contained in:
Raymond Hettinger 2010-12-07 09:37:11 +00:00
parent 68f1e8d87f
commit 673ccf20dc
1 changed files with 8 additions and 7 deletions
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Doc/whatsnew/3.2.rst
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@ -472,14 +472,10 @@ Some smaller changes made to the core Python language are:
produce various issues, especially under Windows. Here is an example produce various issues, especially under Windows. Here is an example
of enabling the warning from the command line:: of enabling the warning from the command line::
$ ./python -Wdefault $ ./python -q -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.
>>> f = open("foo", "wb") >>> f = open("foo", "wb")
>>> del f >>> del f
__main__:1: ResourceWarning: unclosed file <_io.BufferedWriter name='foo'> __main__:1: ResourceWarning: unclosed file <_io.BufferedWriter name='foo'>
>>>
(Added by Antoine Pitrou and Georg Brandl in :issue:`10093` and :issue:`477863`.) (Added by Antoine Pitrou and Georg Brandl in :issue:`10093` and :issue:`477863`.)
@ -541,7 +537,7 @@ New, Improved, and Deprecated Modules
(By Nick Coghlan and Terrence Cole; :issue:`9567`, :issue:`3445`, and (By Nick Coghlan and Terrence Cole; :issue:`9567`, :issue:`3445`, and
:issue:`8814`.) :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: modeled on APL's *scan* operator and on Numpy's *accumulate* function:
>>> list(accumulate(8, 2, 50)) >>> list(accumulate(8, 2, 50))
@ -577,7 +573,12 @@ New, Improved, and Deprecated Modules
in favor of a plain :keyword:`with` statement which can accept multiple in favor of a plain :keyword:`with` statement which can accept multiple
context managers. The latter technique is faster (because it is built-in), 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 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; (Contributed by Georg Brandl and Mattias Brändström;
`appspot issue 53094 <http://codereview.appspot.com/53094>`_.) `appspot issue 53094 <http://codereview.appspot.com/53094>`_.)