main() and main_sub() don't work

[Jaymon]

this doesn't work:

from captain import exit

def main():
    print("main")

def main_foo():
    print("main foo")

if __name__ == "__main__":
    exit(__name__)

I should be able to do:

$ python -m modname
main

$ python -m modname foo
main foo

[Jaymon]

I just got bit by this again in a project, I really need to support this