Python system Administration Chapter 1th, python execution commands, Python functions, orientation-oriented programming, code reuse via import statements

1. Execute commands in Python

Example 1:

[email protected] opt]# cat pyls.py #!/usr/bin/env Python#python wrapper for the LS commandimport subprocess subproces S.call (["LS", "-l"])

Example 2:

[email protected] opt]# cat pysysinfo.py #!/usr/bin/env pythonimport subprocess #Command 1uname= "uname" uname_arg= "-a" Print "Gathering System information with%s command:\n"% uname subprocess.call ([Uname,uname_arg]) #Command 2diskspace= " DF "diskspace_arg="-H "print" Gathering diskspace information with%s command:\n "% Diskspacesubprocess.call ([DiskSpace, Diskspace_arg])

2. Python function

[[email protected] opt]# cat pysysinfo_func.py #!/usr/bin/env python#_*_  Coding:utf-8 _*_import subprocess#command 1def uname_func ():           #函数体下面要有缩进, indent to align, belong to the same level         uname= "uname"         uname_arg= "-A"          print  "gathering system information with %s command:\n"  % uname          subprocess.call ([Uname,uname_arg]) #Command  2def disk _func ():           diskspace= "DF"          diskspace_arg= "-H"         print  " gathering diskspace information with %s command:\n " % diskspace       &nBsp; subprocess.call ([Diskspace,diskspace_arg]) Def main ():         uname_func ()    #调用函数         disk_func () main ()     #调用主函数

3, oriented to the image programming

[[email protected] opt]# vim pyserverclass.py    #!/usr/bin/env  Python#_*_ coding:utf-8 _*_class server (object):    #class关健字, name of the Server class, The object class, the name of the object class, is the parent class         def __init__ (Self,ip, hostname):     #定义构造器                  self.ip=ip                 self.hostname=hostname        def  Set_user (Self,user):                 self.test=user        def ping (SELF,IP_ADDR):                 print  "pinging % s from  %s  (%s)  user is %s " %  (ip_addr,self.ip,self.hostname,self.test) #__name__ This means that if the py file is executed at the top level, it will be equal to the __main__if __name__== ' __main__ ':    #__name__属于模块内置属性, a py file that is written is a module. Store his name         server=server (' 192.168.1.20 ', ' bumbly ')          server.set_user (' Wsyht ')          Server.ping (' 192.168.1.15 ')

4. Implement code reuse via import statement

[email protected] opt]# cat pynewsysinfo.py #!/usr/bin/env pythonimport subprocessfrom pysysinfo_func Import disk_ Funcdef tmp_spack (): tmp_usage= "du" tmp_arg= "-H" path= "/opt" print "Space used in/opt Directo Ry "Subprocess.call ([Tmp_usage,tmp_arg,path]) def main (): Disk_func tmp_spack () if __name__== ' __main__ ' : Main ()

This article is from the "Wsyht blog" blog, make sure to keep this source http://wsyht2015.blog.51cto.com/9014030/1794438

Python system Administration Chapter 1th, python execution commands, Python functions, orientation-oriented programming, code reuse via import statements