[Tutor] Libraries/Modules and how well you know them?

[r dascenzo]

Hello,

As someone relatively new to programming, I've a few questions related  
to the Global Module Index:

http://docs.python.org/modindex.html

What are the distinctions between a library and a module? Do people  
frequently use the terms interchangeably in conversations, mailng  
lists, and around the web?

Looking at the index, there are hundreds of modules. Do "good"  
programmers know the contents of all the modules and functions without  
having to look them up? Are there any suggestions on which might be  
the most useful to become familiar with at first?

Thanks.