subprocess call on python gives Error "Bad file descriptor"

Question

Whenever i call a c code executable from Python using the method below I get a "Bad file descriptor" error. When I run the code from the command prompt it works fine. Help please!?

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

You forgot to add the stdout flag. add stdout = subprocess.PIPE, like this:

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,
)

now, try run your script again