Python OS, os.path and SYS modules

OS: Provides interfaces to interact with the system

Common methods:

Os.name: Show the platform you are using

Os.system (command): Run shell command

OS.GETCWD (): View working directory

Os.chdir (d): Changing the working directory

Os.listdir (d): View all content in the specified directory

Os.remove (f): Delete the specified file

Os.chmod (F,C): Modify the permissions of the specified file, represented by four octal numbers in Linux

Os.makeirs (DN): Create a directory recursively

Os.mkdir (DN): Create directory, parent directory must exist

Os.rmdir (DN): Delete directory, only last level directory (only empty directory can be deleted)

Os.removedirs (DN): Recursively delete directory, specify last level directory to start deletion (only empty directories can be deleted)

C: Permission f: File dn: directory name

Os.path modules, and path-related modules

Common methods:

Os.path. DirName (P): Show path directory name

Os.path. BaseName (P): Show base name

Os.path. Join (D,B): Splicing directory name and base name

Os.path. Split (P): Return (d,b) tuple

Os.path. GetSize (P): Returns the file size if the file exists and returns an exception if it does not exist

Os.path. Exists (p): Determines whether the specified file exists

Os.path. Isdir (P): Determine if it exists and is a directory

Os.path. Isfile (p): Determines whether the file is present and

Os.path. Ismount (p): Determines whether a mount point

P: Path D: Path directory name B: base name

SYS: module related to Python interpreter

Common methods:

Sys.path (): View the search path for import, returned as a list

SYS.ARGV (): Returns the command line parameters, including the script name, returned as a list

Sys.exit (0): Exit program, custom exit code

sys.stdout: Standard output
Sys.stdin: Standard input
Sys.stderr: Error Output

Sys.executable: Returns the Python interpreter path

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Python OS, os.path and SYS modules