python 实时 获取 cmd输出并打印

import subprocess
cmd = 'ping www.baidu.com'
screenData = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
while True:
    line = screenData.stdout.readline()
    print(line.decode('gbk').strip("b'"))
    if line == b'' or subprocess.Popen.poll(screenData) == 0:
        screenData.stdout.close()
        break

文章参考：
使用Python实时获取cmd的输出