Debugger Confusion

[Rex Eastbourne]

I'm a little confused about which debugging utilities do what, and
which I should use for my Python code. I'd like to be able to step
through my code, insert breakpoints, etc. I haven't been able to do
this yet (I'm using Emacs on Windows). I have seen references to GDB,
GUD, PDB, and others. Which ones do I need?

Thanks,

Rex Eastbourne