python 执行CMD命令

'''方法一'''
import  os
s = os.popen('ping baidu.com').read()
print(s)

'''方法二'''
import subprocess
s=subprocess.Popen('ping baidu.com',
                   shell=True,
                   stdout=subprocess.PIPE,
                   stderr=subprocess.STDOUT).stdout.read()
print(s.decode('gbk'))