python之函数

#!/usr/bin/env python
import subprocess
def uname_func():
        uname = "uname"
        uname_arg = "-a"
        print "Gathering system information with %s command:
" % uname
        subprocess.call([uname,uname_arg])

def disk_func():
        diskspace = "df"
        diskspace_arg = "-h"
        print "Gathering diskspace infromation %s command:
" % diskspace
        subprocess.call([diskspace,diskspace_arg])

def main():
        uname_func()
        disk_func()

main()