Python simulate an imported module

Fake a module import by adding a fake module to sys.modules.

import sys

class FakeModule(object):
    PIPE = None
    Popen = None
sys.modules['subprocess'] = FakeModule

Now the following python import from nltk will not fail on App Engine:

from subprocess import PIPE, Popen

Fixes: "ImportError: cannot import name PIPE"

anonymous – Aug 2, 2018
As used in nltk: # Override missing methods on environments where it cannot be used like GAE. import subprocess if not hasattr(subprocess, 'PIPE'): def _fake_PIPE(*args, **kwargs): raise NotImplementedError('subprocess.PIPE is not supported.') subprocess.PIPE = _fake_PIPE if not hasattr(subprocess, 'Popen'): def _fake_Popen(*args, **kwargs): raise NotImplementedError('subprocess.Popen is not supported.') subprocess.Popen = _fake_Popenhttps://github.com/nltk/nltk/blob/develop/nltk/__init__.py
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