Python标准库os

os.name #‘nt‘ for windows, ‘posix‘ for linux/unix

os.getcwd() #get current work directory,即Python脚本工作的目录路径

os.getenv() #get the environment variables

os.setenv() #set the ...

os.listdir(mdir) #list all files and directories name under mdir

os.remove(mfile) #delete mfile

os.system() #run shell command

os.linesep #行终止符, ‘\r\n‘ for windows, ‘\n‘ for linux, ‘\r‘ for mac

os.path.split(mpath) #return (directory,filename)

os.path.isfile(mstr)
os.path.isdir(mstr)
os.path.existe(mdir) # if the mdir exist