python - python 上的子进程调用给出错误 "Bad file descriptor"

Question

每当我使用下面的方法从 Python 调用 C 代码可执行文件时，我都会收到“错误文件描述符”错误。当我从命令提示符运行代码时，它工作正常。请帮忙!？

import subprocess

p = subprocess.call(['C:\Working\Python\celp.exe', '-o', 'ofile'], stdin=subprocess.PIPE, stderr=subprocess.STDOUT)

In [84]: %run "C:\Working\Python\test.py"
Error: : Bad file descriptor

Answer 1

您忘记添加 stdout 标志。添加 stdout = subprocess.PIPE，如下所示:

p = subprocess.call(
    ['C:\Working\Python\celp.exe', '-o', 'ofile'],
    stdin=subprocess.PIPE,
    stdout=subprocess.PIPE,  # needed for the next line to be sensible
    stderr=subprocess.STDOUT,
)

现在，尝试再次运行脚本