What is the os module in Python? Introduction to common methods of os module

This article brings you what is the os module in Python? This introduction to the common methods of the os module has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

os module: It can process files and directories. It is an interface for the Python system and the operating system to interact.

Common methods of the os module:

os.getcwd( ): Get the current working directory (that is, the directory path where the current Python script works)

os.chdir('dirname'): Change the working directory of the current script, equivalent to cd under the shell

os.system('bash command'): Run the shell command and display it directly (equivalent to starting a new shell and then executing that command. After the command execution is completed, the shell exits directly)

os. curdir: Returns the string name of the current directory

os.pardir: Returns the string name of the parent directory of the current directory

os.makedirs('dirname1/dirname2'): Can generate a multi-layer Recursive directory

os.removedirs('dirname1'): If the directory is empty, delete it and recurse to the upper-level directory. If it is also empty, delete it, and so on

os .mkdir('dirname'): Create a directory

os.rmdir('dirname'): Delete a directory. If the directory is not empty, it cannot be deleted and an error will be reported

os.listdir( 'dirname'): Display all files and subdirectories in the specified directory, including hidden files

os.remove(): Delete files

os.rename('oldname', 'newname'): Rename the file/directory. If the new file name/directory name already exists, an error will be reported

os.stat(' path/filename'): Get the file/directory information and can Get the size of the file

os.sep: Output the operating system-specific path separator, such as: win is '\\', Linux is '/'

os.liesep: Output the current The line terminator used by the platform, such as '\t\n' for win and '\n' for Linux

os.pathsep: Outputs the string used to split the file path

os. name: The output string indicates the current platform, such as win ->'nt'; Linux ->'posix'

os.environ: Get the environment variable of the operating system

os. path.abspath(path): Returns the normalized absolute path of path

os.path.split(path): Splits the path into a directory and file name tuple and returns

os.path. dirname(path): Returns the directory of path

os.path.basename(path): Returns the last file name of path (an absolute path only returns the last file name)

os.path .exists(path): Determine whether the path exists. If the path exists, return True; if it does not exist, return False

os.path.isabs(path): Determine whether it is an absolute path. If so, return True

os.path.isfile(path): Determine whether it is a file

os.path.isdir(path): Determine whether it is an existing directory

os .path.join(path1[,path2[,.....]]): Divide the path and file name into two elements in a list and put them together

　os.path .getatime(path): Returns the last access time of the file or directory pointed to by path

os.path.getmtime(path): Returns the last modification time of the file or directory pointed by path

os.popen('dir'): Equivalent to opening a temporary file to store the opened directory (can be assigned to a variable, in the form of a string)

##The difference between system() and popen():

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