python获取运行位数

import platform
platform.architecture()

('32bit', 'WindowsPE')

 

在某些64系统上python可运行在32位模式下，OS X 10.6

$ /usr/bin/python
Python2.6.1(r261:67515,Jul  72009,23:51:51)
[GCC 4.2.1(AppleInc. build 5646)] on darwin
Type"help","copyright","credits"or"license"for more information.
>>>import platform, sys
>>> platform.architecture(), sys.maxint
(('64bit',''),9223372036854775807)
>>>^D
$ export VERSIONER_PYTHON_PREFER_32_BIT=yes
$ /usr/bin/python
Python2.6.1(r261:67515,Jul  72009,23:51:51)
[GCC 4.2.1(AppleInc. build 5646)] on darwin
Type"help","copyright","credits"or"license"for more information.
>>>import platform, sys
>>> platform.architecture(), sys.maxint
(('64bit',''),2147483647)

 

更好的判断方法是用sys.maxint判断

from sys import maxint 
if maxint >> 33: 
print "more than 32 bits" # probably 64 
else: 
print "32 bits"

http://stackoverflow.com/questions/1842544/how-do-i-detect-if-python-is-running-as-a-64-bit-application