Python in OS and sys modules

System-related Information module: Import sys

Sys.Argvis aListthat contains all the command-line arguments.Sys.STDOUT SYS.STDIN SYS.StdErrThe file object that represents the standard input output and the error output, respectively.Sys.Stdin.ReadLine() Read a line from standard inputSys.StdOut.Write ( "a" )   screen output a sys. (exit_code)   exit procedure Span class= "PLN" > Sys. is a dictionarymodule< in the system Span class= "PLN" > Sys. get running operating system environment  Sys.listmodule ,package        

Operating system-related calls and actions: import OS

Os.EnvironOneDictionaryMapping relationships that contain environment variablesOs.Environ["HOME"] Environment variables can be obtainedHOMEThe valueOs.ChDir(Dir) Change the current directoryOs.ChDir(' D:\\outlook ') AttentionWindowsUse to escapeOs.Getcwd() Get current directoryOs.Getegid() Get a valid groupID OS.Getgid() Get GroupID OS.Getuid() Get the userID OS.Geteuid() Get a valid userID OS.Setegid OS.Setegid()Os.Seteuid()Os.Setuid() Os. ()   get user group Name list  OS getlogin ()   get user login name  OS getenv  Get environment variable  Os. set environment variable  Os. set umask os. System (cmd)   Use system invoke, run cmd command             

OS and sys modules in Python