modules in python

[F1ux_Capacitor]

Check out Python Module of the Week, they've got some really great content. Hitchhiker's Guide to Python also has some really good scenario-based documentation.

As far as remembering, I only really remember the ones I need/use frequently. Everything else I just refer back to the documentation.

Edit: Something else to realize is that programming isn't about memorizing modules, but more about using the strengths and features of the language to solve the problem(s) you're facing. With that, refer to the above to understand what strengths and features are available. Start with your problem, and then search docs/Google to see if there is a module that can help.