Python---OS module

Import OS module is required when using OS modules

OS.GETCWD () module functions

Function: Gets the current working directory, that is, the directory path of the current Python script work "no parameter"

How to use:os.getcwd ()

Format such as: a = OS.GETCWD ()

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = OS.GETCWD ()     #获取当前工作目录, that is, the directory path of the current Python script work "no parameter" print (a) #输出 #H : \py

Os.chdir () module functions

Function: Changes the current script working directory, equivalent to the shell under the CD "Ginseng"

How to use:os.chdir ("Path to change in string format")

Format such as: Os.chdir ("D:")

#!/usr/bin/env python #-*-Coding:utf8-*-import os retval = OS.GETCWD ()    # View the current working directory print ("Current working directory is%s"% retval) os. ChDir ("D:")    # Modify Current working directory retval = OS.GETCWD ()    # View modified working directory print ("Directory modification succeeded%s"% retval) #输出 # Current working directory is H:\py # Directory modified successfully D:\

Os.curdir module functions

Function: Returns the current directory: ('. ') "No Reference"

How to use:os.curdir

Format such as: a = Os.curdir

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.curdir   #返回当前目录: ('. ') print (a) #输出 #.

Os.pardir module functions

Function: Gets the parent directory string name of the current directory: (' ... ') "No Reference"

How to use:os.pardir

Format such as: a = Os.pardir

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.pardir   #获取当前目录的父目录字符串名: (' ... ') print (a) #输出 #..

Os.makedirs () module functions

Function: can create multi-level recursive directory "with reference"

How to use:os.makedirs ("directory name or path to create")

Format such as: Os.makedirs ("Div1/div2/div3")

#!/usr/bin/env python #-*-Coding:utf8-*-import os os.makedirs ("Div1/div2/div3")   #可创建多层递归目录

Os.removedirs () module functions

Function: If the directory is empty, then delete, and recursively to the previous level of the directory, if also empty, then delete, and so on "has the reference"

How to use:os.removedirs ("directory name or path to delete")

Format such as: Os.removedirs ("Div1/div2/div3")

#!/usr/bin/env python #-*-Coding:utf8-*-import os os.removedirs ("Div1/div2/div3")   #若目录为空, then delete, and recursively to the previous level of the directory, if also empty, Delete, and so on "with reference"

Os.mkdir () module functions

Function: Create a single-level directory, equivalent to the shell "mkdir"

How to use:os.mkdir ("directory name to create")

Format such as: Os.mkdir ("DSR")

#!/usr/bin/env python #-*-Coding:utf8-*-import os os.mkdir ("DSR")   #生成单级目录; equivalent to the shell mkdir "ginseng"

Os.rmdir () module functions

Function: Delete the single-level empty directory, if the directory is not empty can not be deleted, error, equivalent to the shell rmdir "ginseng"

How to use:os.rmdir ("Directory name to remove")

Format such as: Os.rmdir ("DSR")

#!/usr/bin/env python #-*-Coding:utf8-*-import os os.rmdir ("DSR")   #删除单级空目录, if the directory is not empty can not be deleted, error, equivalent to the shell rmdir "ginseng"

Os.listdir () module functions

Features: Lists all files and subdirectories under the specified directory, including hidden files, and prints "ginseng" as a list

How to use:os.listdir ("directory name")

Format: a = Os.listdir ("Lib")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.listdir ("Lib")   #列出指定目录下的所有文件和子目录, including hidden files, and print "parametric" pri as a list NT (a) #输出文件名称和目录名称 # [' mk.py ', ' __pycache__ ']

Os.remove () module functions

Function: Delete a file, the directory does not work "ginseng"

How to use:os.remove ("Directory name to remove")

Format such as: Os.remove ("2.txt")

#!/usr/bin/env python #-*-Coding:utf8-*-import os os.remove ("2.txt")   #删除一个文件

Os.rename () module functions

Function: Rename file or directory "with reference"

How to use:os.rename ("File or directory name", "file or directory name to be modified")

Formats such as: Os.rename ("1.txt", "2.txt")

#!/usr/bin/env python #-*-Coding:utf8-*-import os os.rename ("1.txt", "2.txt")   #重命名文件或目录

Os.stat () module function "Common"

Function: Get file or directory information "with reference"

How to use:os.stat ("file or directory name to get information")

Format: a = Os.stat ("22")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.stat ("#获取文件或者目录信息")   print (a)

OS.SEP module functions

Function: Operating system-specific path delimiter, win under "\", Linux for "/" "No parameter"

How to use: Os.sep

Format such as: a = Os.sep

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.sep   #操作系统特定的路径分隔符, win under "\", Linux for "/" Print (a)

OS.LINESEP module functions

Function: The current platform uses a newline character, win under "\t\n", Linux for "\ n" "No parameter"

How to use:os.linesep

Format such as: a = Os.linesep

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.linesep   #当前平台使用的行终止符, win under "\t\n", Linux "\ n" b = "Hello,%s in?" "% (a)   #相当于加了 \ n newline character print (b) #输出 # hello # are you there?

OS.PATHSEP module functions

Function: The string "no parameter" used to split the file path

How to use:os.pathsep

Format such as: a = Os.pathsep

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.pathsep   #用于分割文件路径的字符串 print (a) #输出 #;

Os.name module functions

Function: string indicates the current use of the platform. Win-> ' NT '; Linux-> ' POSIX '"no Reference"

How to use:os.name

Format such as: a = Os.name

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.name   #字符串指示当前使用平台. Win-> ' NT '; Linux-> ' POSIX ' print (a) #输出 # NT

Os.system () module functions

Function: Run the shell command, directly display the "ginseng"

How to use:os.system ("Shell system Command ")

Format such as: Os.system ("Bash command")

#!/usr/bin/env python #-*-Coding:utf8-*-import os os.system ("Bash command")   #运行shell命令, direct display

Os.environ module functions

Function: Get system environment variable "no parameter"

How to use:Os.environ

Format such as: a = Os.environ

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.environ   #获取系统环境变量 for I in a:     #循环出系统环境变量     Print (i) #输出 # userprofile # COMSPEC # PYTHONPATH # processor_level # OS # USERNAME # allusersprofile # programfiles (X86) # Progra  Mfiles # number_of_processors # PROGRAMDATA # localappdata # public # psmodulepath # commonprogramfiles (X86) # homedrive # SessionName # logonserver # pathext # commonprogramfiles # systemdrive # windir # COMPUTERNAME # Userdomain_roamingprofil E # PATH # pythonioencoding # SYSTEMROOT # COMMONPROGRAMW6432 # processor_architecture # userdomain # pycharm_hosted # APP DATA # TEMP # PROGRAMW6432 # processor_identifier # homepath # processor_revision # pythonunbuffered # TMP

Os.path.abspath () module functions

Function: Returns the canonical absolute path of a file or directory "with reference"

How to use:os.path.abspath ("file or directory name to return canonical absolute path")

Format as: a = Os.path.abspath ("mk.py")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.path.abspath ("mk.py")   #返回一个文件或者目录的规范化的绝对路径 Print (a) #输出 # H:\py\mk.py

Os.path.split () module functions

Functions: Splitting files into directories and filenames two tuples return "ginseng"

How to use:os.path.split ("Path or name")

Format as: a = Os.path.split ("mk.py")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.path.split ("mk.py")   #将path分割成目录和文件名二元组返回 Print (a) #输出 # ( ', ' mk.py ')

Os.path.dirname () module function "Common"

Function: Returns the file's directory "has the parameter"

How to use:os.path.dirname ("File path")

Format as: a = Os.path.dirname ("py/lib/mk.py")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.path.dirname ("py/lib/mk.py")   #返回文件的目录 Print (a) #输出 # py/l Ib

Os.path.basename () module functions

Function: Returns the last file name of the file. How to file with/or \ End "With reference"

How to use:os.path.basename ("File path")

Format as: a = Os.path.basename ("py/lib/mk.py")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.path.basename ("py/lib/mk.py")   #返回文件最后的文件名. How to file with/or \ End Print (a) #输出 # mk.py

Os.path.exists () module function "Common"

Function: Returns True if the file exists, returns False if the file does not exist

How to use:os.path.exists ("File path")

Format as: a = os.path.exists ("h:/py/lib/mk.py")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.path.exists ("h:/py/lib/mk.py")   #如果文件存在, returns True if the file does not exist, Returns false Print (a) #输出 # True

Os.path.isabs () module function "Common"

Function: If the file is an absolute path, returns true "parameter"

How to use:os.path.isabs ("File path")

Format as: a = Os.path.isabs ("h:/py/lib/mk.py")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.path.isabs ("h:/py/lib/mk.py")   #如果文件是绝对路径, returns True Print (a) #输出 # True

Os.path.isfile () module function "Common"

Function: Returns True if the file is a file that exists. Otherwise, false "parameter" is returned.

How to use:os.path.isfile ("File path")

Format as: a = Os.path.isfile ("h:/py/lib/mk.py")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.path.isfile ("h:/py/lib/mk.py")   #如果文件是一个存在的文件, returns True. Otherwise returns false print (a) #输出 # True

Os.path.isdir () module function "Common"

Function: Returns True if the directory is a directory that exists. Otherwise, false "parameter" is returned.

How to use:os.path.isdir ("directory path")

Format as: a = Os.path.isdir ("H:/py/lib")

#!/usr/bin/env python #-*-Coding:utf8-*-import os a = Os.path.isdir ("H:/py/lib")   #如果目录是一个存在的目录, returns True. Otherwise returns false print (a) #输出 # True

Os.path.join () module function "Common"

Function: Combine multiple string paths to return a full path, and parameters before the first absolute path will be ignored "parameter"

How to use:os.path.join ("File path")

Format: a = Os.path.join (S1,S2,S3,S4)

#!/usr/bin/env python #-*-Coding:utf8-*-import os s1 = "H:" s2 = "py" s3 = "Lib" s4 = "mk.py" a = Os.path.join (s1,s2,s 3,S4)   #将多个字符串路径组合成一个完整的路径返回, parameters prior to the first absolute path will be ignored #输出 #H:p the "parameter" print (a) y\lib\mk.py

Os.path.getatime () module functions

Function: Returns the last access timestamp of the file or directory to which it is pointing "has a reference"

How to use:os.path.getatime ("File path")

Format as: a = Os.path.getatime ("H:/py/lib")

#!/usr/bin/env python #-*-coding:utf8-*-import os import time a = Os.path.getatime ("H:/py/lib")   #返回所指向的文件或者目录的最后存 Take timestamp B = Time.strftime ("%y-%m-%d%h:%m:%s", Time.gmtime (a))   #将时间戳转换成时间格式 print (b) #输出 # 2016-08-22 20:41:28

Os.path.getmtime () module functions

Function: Returns the last access timestamp of the file or directory to which it is pointing "has a reference"

How to use:os.path.getmtime ("File path")

Format as: a = Os.path.getmtime ("H:/py/lib")

#!/usr/bin/env python #-*-coding:utf8-*-import os import time a = Os.path.getmtime ("H:/py/lib")   #返回所指向的文件或者目录的最后修改 Timestamp B = Time.strftime ("%y-%m-%d%h:%m:%s", Time.gmtime (a))   #将时间戳转换成时间格式 print (b) #输出 # 2016-08-22 20:41:28

Os.stat (). st_size Check the size of a file, return bytes

How to use:os.stat (the file path or file name to check for size). St_size

Format: Os.stat ("32.png"). St_size

DX = Os.stat ("32.png"). St_size #检测要发送文件的大小

os.getcwd()                 获取当前工作目录，即当前python脚本工作的目录路径

os.chdir("dirname")         改变当前脚本工作目录；相当于shell下cd os.curdir                   返回当前目录: (‘.‘) os.pardir                   获取当前目录的父目录字符串名：(‘..‘) os.makedirs(‘dir1/dir2‘)    可生成多层递归目录 os.removedirs(‘dirname1‘)   若目录为空，则删除，并递归到上一级目录，如若也为空，则删除，依此类推 os.mkdir(‘dirname‘)         生成单级目录；相当于shell中mkdir dirname os.rmdir(‘dirname‘)         删除单级空目录，若目录不为空则无法删除，报错；相当于shell中rmdir dirname os.listdir(‘dirname‘)       列出指定目录下的所有文件和子目录，包括隐藏文件，并以列表方式打印 os.remove()                 删除一个文件 os.rename("oldname","new")  重命名文件/目录 os.stat(‘path/filename‘)    获取文件/目录信息 os.sep                      操作系统特定的路径分隔符，win下为"\\",Linux下为"/" os.linesep                  当前平台使用的行终止符，win下为"\t\n",Linux下为"\n" os.pathsep                  用于分割文件路径的字符串 os.name                     字符串指示当前使用平台。win->‘nt‘; Linux->‘posix‘ os.system("bash command")   运行shell命令，直接显示 os.environ                  获取系统环境变量 os.path.abspath(path)       返回path规范化的绝对路径 os.path.split(path)         将path分割成目录和文件名二元组返回 os.path.dirname(path)       返回path的目录。其实就是os.path.split(path)的第一个元素 os.path.basename(path)      返回path最后的文件名。如何path以／或\结尾，那么就会返回空值。即os.path.split(path)的第二个元素 os.path.exists(path)        如果path存在，返回True；如果path不存在，返回False os.path.isabs(path)         如果path是绝对路径，返回True os.path.isfile(path)        如果path是一个存在的文件，返回True。否则返回False os.path.isdir(path)         如果path是一个存在的目录，则返回True。否则返回False os.path.join(path1[, path2[, ...]])  将多个路径组合后返回，第一个绝对路径之前的参数将被忽略 os.path.getatime(path)      返回path所指向的文件或者目录的最后存取时间 os.path.getmtime(path)      返回path所指向的文件或者目录的最后修改时间

Os.popen ("dir"). Read () Get directory information

Python---OS module