os.name #‘nt‘ for windows, ‘posix‘ for linux/unixos.getcwd() #get current work directory,即Python脚本工作的目录路径os.getenv() #get the environment variablesos.setenv() #set the ...os.listdir(mdir) #list all files and directories name under mdiros.remove(mfile) #delete mfileos.system() #run shell commandos.linesep #行终止符, ‘\r\n‘ for windows, ‘\n‘ for linux, ‘\r‘ for macos.path.split(mpath) #return (directory,filename)os.path.isfile(mstr)os.path.isdir(mstr)os.path.existe(mdir) # if the mdir exist