Python Cheetah01

练习1、调用subprocess模块，执行df命令，查看磁盘使用情况

vim pydf.py
#!/usr/bin/env python
#python wrapper for the ls command

import subprocess
subprocess.call(["df","-h"])

[root@sio python]# python pydf.py 
Filesystem            Size  Used Avail Use% Mounted on
/dev/vda1              40G   11G   27G  29% /
tmpfs                  32G     0   32G   0% /dev/shm
/dev/mapper/a8data-a8data01
                      483G   17G  442G   4% /a8root

练习2、调用subprocess模块，执行ls命令,查看文件列表

vim pyls.py
#!/usr/bin/env python
#python wrapper for the ls command

import subprocess
subprocess.call(["ls","-l"])

练习3、调用subprocess模块，执行df uname命令,查看信息

vim pyinfo.py
#!/usr/bin/env python
#python wrapper for the ls command

import subprocess

#Command1
uname="uname"
uname_arg="-a"

print "\033[1;32;40mGathering System information with %s command:\033[0m\n" % uname
subprocess.call([uname,uname_arg])

#Command2
df="df"
df_arg="-h"

print "\033[1;32;40mGathering diskspace information with %s command:\033[0m\n" % df
subprocess.call([df,df_arg])

练习4、将其写成函数形式

vim pyinfo_func.py
#!/usr/bin/env python
#python wrapper for the ls command

import subprocess

#Command1
def uname_func():
    uname="uname"
    uname_arg="-a"

    print "\033[1;32;40mGathering System information with %s command:\033[0m\n" % uname
    subprocess.call([uname,uname_arg])

#Command2
def disk_func():
    df="df"
    df_arg="-h"

    print "\033[1;32;40mGathering diskspace information with %s command:\033[0m\n" % df
    subprocess.call([df,df_arg])

def main():
    uname_func()
    disk_func()


main()

练习5、简化函数

vim pyinfo_func_2.py
#!/usr/bin/env python
#python wrapper for the ls command

import subprocess

def command_func(cmd,cmd_arg):
    print "\033[1;32;40mGathering System information with %s command:\033[0m\n" % cmd
    subprocess.call([cmd,cmd_arg])

def main():
    command_func("uname","-a")
    command_func("df","-h")

if __name__=='__main__':
    main()

练习6、调用自己写的函数

vim py_new.py
#!/usr/bin/env python
import subprocess
from pyinfo_func_2 import command_func

def main():
    command_func('df','-h')

if __name__=='__main__':
    main()