change of random state when pyc created??

[Alan Isaac]

This may seem very strange, but it is true.
If I delete a .pyc file, my program executes with a different state!

In a single directory I have
module1 and module2.

module1 imports random and MyClass from module2.
module2 does not import random.

module1 sets a seed like this::

if __name__ == "__main__":
    random.seed(314)
    main()

I execute module1.py from the (Windows) shell.
I get a result, let's call it result1.
I execute it again. I get another result, say result2.
Running it again and again, I get result2.

Now I delete module2.pyc.
I execute module1.py from the shell.
I get result1.
I execute it again; I get result2.
>From then on I get result2,
unless I delete module.pyc again,
in which case I once again get result1.

Can someone explain this to me?

Thank you,
Alan Isaac