python按进程名查看进程创建时间小程序

#!/usr/bin/python
#_*_encoding:utf-8_*_
#print the process create time by the process name .

import psutil,datetime,sys

if sys.argv[1] == "-h":
    print "Usage:%s -h|httpd|nginx|mysqld|and so on" % sys.argv[0]
    print "例如:python processt.py httpd #查看httpd进程创建的时间戳。"
    exit()
def processt(name,):
    pid = psutil.pids()
    for i in pid:
        pn = psutil.process(i) 
        if pn.name() == name:
             r = datetime.datetime.fromtimestamp(psutil.process(i).create_time()).strftime("%y-%m-%d;%h:%m:%s")
    print name + "'s create time is : " + r
processt(sys.argv[1])