pexpect 3.3 runs failed when use multiprocessing

[bizet]

I use pexpect (version 3.3) and multiprocessing in python (version 2.6) code like below:

import pexpect, multiprocessing

def login(h, u, p):
  ssh_new_key = ssh_change_key = 'abc'
  ssh = pexpect.spawn('ssh %s@%s' % (u, h))
  index = ssh.expect([ssh_change_key, ssh_new_key, 'password:'], timeout=5)

def worker():
    login('1.2.3.4', 'abc', 'abc')

if __name__ == '__main__':
  e_process = multiprocessing.Process(target=worker, args=[])
  e_process.start()
  e_process.join()

but runs failed, with this traceback:

Process Process-1:
Traceback (most recent call last):
  File "/usr/lib64/python2.6/multiprocessing/process.py", line 232, in _bootstrap
    self.run()
  File "/usr/lib64/python2.6/multiprocessing/process.py", line 88, in run
    self._target(*self._args, **self._kwargs)
  File "test.py", line 8, in worker
    login('1.2.3.4', 'abc', 'abc')
  File "test.py", line 4, in login
    ssh = pexpect.spawn('ssh %s@%s' % (u, h))
  File "/usr/lib/python2.6/site-packages/pexpect-3.3-py2.6.egg/pexpect/__init__.py", line 493, in __init__
    fd = sys.__stdin__.fileno()
ValueError: I/O operation on closed file

however pexpect 3.3 runs well in a none multiprocessing environment
And I test it on pexpect 2.4 (also with python 2.6), it runs well too.

[jquast]

Ahh, I guess stdin is closed, as seen in https://docs.python.org/2/library/multiprocessing.html#all-platforms under section. I made this change, I'll revert it -- thanks.

[fordguo]

I count the same problem with celery :(

[takluyver]

Closed by #109.