如何捕获子进程的 stdout 输出? [英] How can I capture the stdout output of a child process?

问题描述

我正在尝试用 Python 编写程序，但有人告诉我要运行一个 .exe 文件.当这个 .exe 文件运行时，它会吐出大量数据，我需要将某一行打印到屏幕上.我很确定我需要使用 subprocess.popen 或类似的东西，但我是 subprocess 的新手并且不知道.任何人都有一种简单的方法可以让我完成这项工作?

I'm trying to write a program in Python and I'm told to run an .exe file. When this .exe file is run it spits out a lot of data and I need a certain line printed out to the screen. I'm pretty sure I need to use subprocess.popen or something similar but I'm new to subprocess and have no clue. Anyone have an easy way for me to get this done?

推荐答案

是这样的:

import subprocess
process = subprocess.Popen(["yourcommand"], stdout=subprocess.PIPE)
result = process.communicate()[0]

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