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Merged revisions 87421 via svnmerge from 

svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r87421 | antoine.pitrou | 2010-12-21 19:49:01 +0100 (mar., 21 déc. 2010) | 4 lines

  Suggest sys.maxsize as a reliable way to know whether the interpreter is 64-bit.
  (part of #10735)
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Antoine Pitrou 2010-12-21 18:56:38 +00:00
parent c7611d1126
commit 9fc6b6c453
1 changed files with 11 additions and 1 deletions
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Doc/library/platform.rst
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@ -36,6 +36,16 @@ Cross Platform
and then only if the executable points to the Python interpreter. Reasonable and then only if the executable points to the Python interpreter. Reasonable
defaults are used when the above needs are not met. defaults are used when the above needs are not met.
.. note::
On Mac OS X (and perhaps other platforms), executable files may be
universal files containing multiple architectures.
To get at the "64-bitness" of the current interpreter, it is more
reliable to query the :attr:`sys.maxsize` attribute::
is_64bits = sys.maxsize > 2**32
.. function:: machine() .. function:: machine()
@ -186,7 +196,7 @@ Windows Platform
.. note:: .. note::
Note: this function works best with Mark Hammond's This function works best with Mark Hammond's
:mod:`win32all` package installed, but also on Python 2.3 and :mod:`win32all` package installed, but also on Python 2.3 and
later (support for this was added in Python 2.6). It obviously later (support for this was added in Python 2.6). It obviously
only runs on Win32 compatible platforms. only runs on Win32 compatible platforms.