Python Module Learning: OS module

I. Overview of OS Modules

The Python OS module contains common operating system features. This module is especially important if you want your program to be platform-agnostic.

Second, common methods

1, Os.name

The output string indicates the platform being used. If the window is ' NT ', it is ' POSIX ' for Linux/unix users.

2, OS.GETCWD ()

The function gets the current working directory, which is the directory path of the current Python script work.

3, Os.listdir ()

Returns all file and directory names under the specified directory.

>>> Os.listdir (OS.GETCWD ()) [' Django ', ' DLLs ', ' Doc ', ' include ', ' Lib ', ' Libs ', ' LICENSE.txt ', ' Mysql-python-wininst.log ', ' NEWS.txt ', ' pil-wininst.log ', ' python.exe ', ' pythonw.exe ', ' README.txt ', ' Removemysql-python.exe ', ' RemovePIL.exe ', ' Removesetuptools.exe ', ' Scripts ', ' setuptools-wininst.log ', ' tcl ', ' Tools ', ' W9xpopen.exe ']>>>

4, Os.remove ()

Deletes a file.

5, Os.system ()

Run the shell command.

>>> os.system (' dir ') 0>>> os.system (' cmd ') #启动dos

6. OS.SEP can replace operating system-specific path separators.

7. Os.linesep string gives the line terminator used by the current platform

>>> os.linesep ' \ r \ n ' #Windows使用 ' \ r \ n ', Linux uses ' \ n ' and Mac uses ' \ R '. >>> os.sep ' \ \ ' #Windows >>>

8, Os.path.split ()

function returns the directory name and file name of a path

>>> os.path.split (' C:\\python25\\abc.txt ') (' C:\\python25 ', ' abc.txt ')

The 9, Os.path.isfile (), and Os.path.isdir () functions respectively verify that the given path is a file or a directory.

>>> Os.path.isdir (OS.GETCWD ()) true>>> os.path.isfile (' a.txt ') False

10, Os.path. The Exists() function is used to verify that the given path really exists

>>> os.path.exists (' c:\\python25\\abc.txt ') false>>> os.path.exists (' C:\\python25 ') true>> >

11. Os.path.abspath (name): Get absolute path

12, Os.path.normpath (PATH): Canonical path string form

13, Os.path.getsize (name): Get file size, if name is directory return 0L

14, Os.path.splitext (): Detach file name and extension

>>> os.path.splitext (' a.txt ') (' a ', '. txt ')

15, Os.path.join (path,name): Connection directory and file name or directory

>>> os.path.join (' C:\\python ', ' a.txt ') ' C:\\python\\a.txt ' >>> os.path.join (' C:\\python ', ' F1 ') ' C : \\Python\\f1 ' >>>

16. Os.path.basename (PATH): Return file name

>>> os.path.basename (' a.txt ') ' A.txt ' >>> os.path.basename (' c:\\python\\a.txt ') ' A.txt ' >> >

17. Os.path.dirname (PATH): Return file path

>>> os.path.dirname (' c:\\python\\a.txt ') ' C:\\python '

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Python Module Learning: OS module