python subprocess pipe 实时输出日志的操作

* test11.py

import timeprint '1'time.sleep(2)print '1'time.sleep(2)print '1'time.sleep(2)print '1'

* test.py

import subprocess

p = subprocess.Popen('python test11.py', shell=True, stdout=subprocess.PIPE)

# None表示正在执行中

while p.poll() is None: <br>out = p.stdout.readline() <br>if out != '': <br>print out

补充知识：python 通过 subprocess.Popen执行命令，重定向实时输出

执行命令

import subprocessimport sys# 常用编码GBK = ’gbk’UTF8 = ’utf-8’# 解码方式，一般 py 文件执行为utf-8 ，cmd 命令为 gbkcurrent_encoding = GBKpopen = subprocess.Popen(’ping www.baidu.com’, shell = True, stdout = subprocess.PIPE, stderr = subprocess.PIPE, bufsize = 1)out,err = popen.communicate()print(’std_out: ’ + out)print(’std_err: ’ + err)print(’returncode: ’ + str(popen.returncode))

执行 .py文件

import subprocessimport sys# 常用编码GBK = ’gbk’UTF8 = ’utf-8’current_encoding = UTF8 popen = subprocess.Popen(’python D:codetest.py’, stdout = subprocess.PIPE, stderr = subprocess.PIPE, bufsize = 1)out,err = popen.communicate()print(’std_out: ’ + out)print(’std_err: ’ + err)print(’returncode: ’ + str(popen.returncode))

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