Import module - undefined global variable

Question

I thought I understood and fixed this problem:  A variable defined in a module remains undefined after I import the module.  Here is the simplified version.

The main script and the module are in the same folder/dir.

This is my module:  mysettings.py

def main():

myvar = "This is imported."

if __name__ == '__main__':
    main()

This is my script:  irp.py:

import mysettings

def main():

print myvar

if __name__ == '__main__':
    main()

Interpreter error:

NameError: global name 'myvar' is not defined

Can you tell me why?

Thanks,

DonBarker · Answer

Got it now.  Thanks again for taking time to reply and explain.

MathewCoyle · Answer

Your mysettings.py should be something along these lines, depending on what it does.def main():

myvar = "This is imported."
    return myvar

if __name__ == '__main__':
    main()

Your irp.py should be something like this.import mysettings

def main():

print mysettings.main()

if __name__ == '__main__':
    main()

DonBarker · Answer

Matthew,

Thanks for taking time to reply.

I'm a Python novice so don't understand how/where to use this in my script.  Can you explain?