[issue19946] Have multiprocessing raise ImportError when spawning a process that can't find the "main" module

[Olivier Grisel]

Olivier Grisel added the comment:

> what is sys.modules['__main__'] and sys.modules['__main__'].__file__ if you 
> run under nose?

$ cat check_stuff.py 
import sys

def test_main():
    print("sys.modules['__main__']=%r"
          % sys.modules['__main__'])
    print("sys.modules['__main__'].__file__=%r"
          % sys.modules['__main__'].__file__)


if __name__ == '__main__':
    test_main()
(pyhead) ogrisel@is146148:~/tmp$ python check_stuff.py 
sys.modules['__main__']=<module '__main__' from 'check_stuff.py'>
sys.modules['__main__'].__file__='check_stuff.py'
(pyhead) ogrisel@is146148:~/tmp$ nosetests -s check_stuff.py 
sys.modules['__main__']=<module '__main__' from 
'/volatile/ogrisel/envs/pyhead/bin/nosetests'>
sys.modules['__main__'].__file__='/volatile/ogrisel/envs/pyhead/bin/nosetests'
.
----------------------------------------------------------------------
Ran 1 test in 0.001s

OK

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