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('33[31;1m执行结果133[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('33[31;1m执行结果233[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('33[31;1m执行结果333[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('33[31;1m执行结果433[0m')
print(obj3.stdout.read().decode('utf-8'))