run a set of files in Python

I have a set of Python files -- not class files -- that each accomplish a certain task.  They contain function definitions that use the same name (not my doing), and all contain the line

if __name__ == '__main__':

which runs the functions in that py file.  I need to run all these files and aggregate the output from a single py file.  How do I do this?

I use lines like:

import ScatterValues as sv
import ScatterProcessApproach as spro

so this should import each files' functions into that namespace, correct?  So, how do I run each file given that each file is checking to see if it is "__main__"?  What's the right approach?

Thanks!