Python将数据发送到在终端中作为参数传递的可执行文件 [英] Python send data to an executable passed as parameter in terminal

问题描述

我有一个python脚本从命令行获取2个参数，一个可执行文件和一个文件。在我做一些计算后，我需要通过stdin这个计算的结果到可执行文件。

I have a python script which gets 2 parameters from the command line, an executable and a file. After I do some computation I need to pass by stdin the result of this computation to the executable.

1）这是甚至可能吗？
2）如果是这样，我怎么在Python中这样做

1) is this even possible? 2) if so, how can I do this in Python

推荐答案

首先，你不应该使用os.system这是一个非常危险和坏的习惯。

First, you should never use os.system that's a very dangerous and bad habit.

对于你的问题，使用子进程你可以做以下：

As for your problem, using subprocess you can do the following:

from subprocess import Popen, PIPE, STDOUT

#do some stuff 
data = do_some_computation_from_file

#prepare your executable using subprocess.Popen
exe = Popen(['your_executable'], stdout=PIPE, stdin=PIPE, stderr=STDOUT)

#pass in the computed data to the executable and grap the result
result = exe.communicate(input=data)[0]

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