[py-dev] How best to notify modules?

[Michael Hipp]

What's the best technique for this?

My current project uses lots of timestamps ( i.e now(), today() ) but this 
causes lots of things to return different results with every run. So for the 
cases where the module under test needs to return results that are binary 
repeatable with every run, I want to centralize all my calls to the above 
functions in one place and have them return a predetermined value when under test.

So how best to communicate to a module that it is under test and a few certain 
things need to modify their behavior slightly?

Just looking for "best practices" here.

Thanks,
Michael