Complexity of methods etc

[Nathan Harmston]

Hi,

I was wondering if anyone knew of any resources, where I might be able
to find information about the complexity of certain python functions
or little tips on how to reduce complexity. I mean like the "".join(),
kind of thing?

I want to see if there are any improvements I can add to my coding in
order to reduce  time/space usage/

Many Thanks in advance

Nathan