[julia-users] Julia way to determine if file was included or is "main"?

[David Smith]

Is there a preferred idiom in Julia to match the equivalent Python:

if __name__ == '__main__':
    run_like_a_command()
else:
    be_a_module()

I tried searching, but apparently am not hitting the right keywords. Maybe 
my terminology is incorrect.

Thanks, and sorry if this is obvious.