Python模块subprocess

subprocess的常用用法

 """
 Description:
 Author:Nod
 Date:
 Record:
 #---------------------------------v1-----------------------------------#
 """

 import subprocess
 import time

 # 正确的命令通过管道输出
 obj = subprocess.Popen('ping 127.0.0.1', shell=True,
                        stdout=subprocess.PIPE,
                        stderr=subprocess.PIPE,
                        )
 print('\033[31;1m执行结果1\033[0m')
 print(obj.stdout.read().decode('gbk'))

 # 不正确的命令通过管道输出
 obj = subprocess.Popen('12ping 127.0.0.1', shell=True,
                        stdout=subprocess.PIPE,
                        stderr=subprocess.PIPE,

                        )
 print('\033[31;1m执行结果2\033[0m')
 print(obj.stderr.read().decode('gbk'))

 # 执行一串命令的方式1   tasklist | findstr python
 obj = subprocess.Popen(
     'tasklist | findstr python', shell=True,
     stdout=subprocess.PIPE,  # 命令的正确结果进入管道
     stderr=subprocess.PIPE,  # 命令的错误结果进入另外1个管道

 )
 print('\033[31;1m执行结果3\033[0m')
 print(obj.stdout.read().decode('gbk'))

 # 执行一串命令的方式2
 obj2 = subprocess.Popen(
     'tasklist', shell=True,
     stdout=subprocess.PIPE,
     stderr=subprocess.PIPE,
 )
 # 此处会将obj2的执行结果输入给obj2   stdin=obj2.stdout,
 obj3 = subprocess.Popen(
     'findstr python',
     shell=True,
     stdin=obj2.stdout,
     stdout=subprocess.PIPE,
     stderr=subprocess.PIPE,
 )
 print('\033[31;1m执行结果4\033[0m')
 print(obj3.stdout.read().decode('utf-8'))