小编dev*_*ull的帖子

我在从子进程stdout管道获取输出时遇到了一些困难.我正在通过它启动一些第三方代码,以便提取日志输出.直到最近更新第三方代码,一切正常.更新后,python已无限期地开始阻塞,并且实际上没有显示任何输出.我可以手动启动第三方应用程序并查看输出.

我正在使用的代码的基本版本:

import subprocess, time
from threading import Thread

def enqueue_output(out):
    print "Hello from enqueue_output"
    for line in iter(out.readline,''):
        line = line.rstrip("\r\n")
        print "Got %s" % line
    out.close()

proc = subprocess.Popen("third_party.exe", stdout=subprocess.PIPE, bufsize=1)
thread = Thread(target=enqueue_output, args=(proc.stdout,))
thread.daemon = True
thread.start()

time.sleep(30)

如果我将third_party.exe替换为此脚本,则此方法非常有效:

import time, sys

while True:
    print "Test"
    sys.stdout.flush()
    time.sleep(1)

所以我不清楚魔法需要做什么才能使用原始命令.

这些都是subprocess.Popen行的所有变种我试过没有成功:

proc = subprocess.Popen("third_party.exe", stdout=subprocess.PIPE, bufsize=0)
proc = subprocess.Popen("third_party.exe", stdout=subprocess.PIPE, shell=True)
proc = subprocess.Popen("third_party.exe", stdout=subprocess.PIPE, creationflags=subprocess.CREATE_NEW_CONSOLE)
si = subprocess.STARTUPINFO()
si.dwFlags = subprocess.STARTF_USESTDHANDLES | subprocess.STARTF_USESHOWWINDOW
proc = subprocess.Popen("third_party.exe", …