python subprocess pipe_python subprocess pipe 实时输出日志的操作

* test11.py

import time

print "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:
out = p.stdout.readline()
if out != "":
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 subprocess

import 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 gbk

current_encoding = GBK

popen = 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 subprocess

import sys

# 常用编码

GBK = 'gbk'

UTF8 = 'utf-8'

current_encoding = UTF8

popen = subprocess.Popen('python D:\code\test.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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