python - subprocess.Popen 尝试写入不存在的管道

Question

为什么以下不起作用？

import subprocess

process = subprocess.Popen('cmd.exe', shell=False, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=None)

我得到的输出如下:

The process tried to write to a nonexistent pipe.
The process tried to write to a nonexistent pipe.
The process tried to write to a nonexistent pipe.
The process tried to write to a nonexistent pipe.
The process tried to write to a nonexistent pipe.

此后，进程将终止且不会出现错误。我运行的是 Windows 7。

Answer 1

我正在运行 Windows 10 并遇到同样的问题。如果我将 stdout 和 stderr 设置为相同的值，该错误就会消失。尝试将它们都设置为 subprocess.PIPE 而不仅仅是 stdout。