How to use Python files spread out over many folders, or: how to organize a project

I am looking to make my project fulfill the guidelines described here: http://infinitemonkeycorps.net/docs/pph/. I currently have the following directories:

src/
test/
doc/

I would really like to organize my src/ file as follows开发者_C百科:

src/
   similar_files/
   other_files/
   helpers/
   etc

However, I'm not familiar with how I could have my modules and classes interact the same way, i.e. if some module in one folder needs access to one in another folder. Is this a bad way to organize my project? If not, how can I accomplish what I want?

Thanks!

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You'll want to read the tutorial.. here! :D

Section 6.4.2 also contains the references that would assist you.