Python Module-sys module

Sys.version get version information for Python interpreter

>>> sys.version ' 2.7.12 (default, Dec  4, 14:50:18) \N[GCC 5.4.0 20160609] '

Sys.platform returns the operating system platform name

>>> sys.platform ' linux2 '

Sys.getrecursionlimit () #获取最大递归层数

>>> Sys.getrecursionlimit () 1000

Sys.setrecursionlimit () #设置最大递归层数

>>> sys.setrecursionlimit () >>> sys.getrecursionlimit () 5000

Sys.getdefaultencoding () #获取解释器默认编码

>>> sys.getdefaultencoding () ' ASCII '

Sys.getfilesystemencoding () #获取内存数据存到文件里的默认编码

>>> sys.getfilesystemencoding () ' UTF-8 '

Sys.maxint the largest int value

>>> sys.maxint9223372036854775807

Sys.maxsize in Python3

>>> sys.maxsize9223372036854775807

Sys.path returns the search path for the module, using the value of the PYTHONPATH environment variable when initializing

>>> sys.path[', '/usr/lib/python35.zip ', '/usr/lib/python3.5 ', '/usr/lib/python3.5/plat-x86_64-linux-gnu ', '/usr/lib/python3.5/lib-dynload ', '/home/sch01ar/.local/lib/python3.5/site-packages ', '/usr/local/lib/ Python3.5/dist-packages ', '/usr/lib/python3/dist-packages ']

SYS.ARGV command-line argument list, the first element is the path of the program itself

Import sysif sys.argv:   print (SYS.ARGV)

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Sys.exit (n) exit program, Exit normally (0)

Import sysprint (' sys test ') sys.exit (0) print (' a ')

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Sys.exit () adds a parameter to print before exiting the program

Import sysprint (' sys test ') sys.exit (' Python would exit ')

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Sys.exit () for exiting in the main thread, Os._exit () for exiting in thread

Sys.stdin.readline () standard input

>>> sys.stdin.readline () python ' python\n '

Sys.stdout.write () Standard output

Import syssys.stdout.write (' python\n ')

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Python Module-sys module