debugging in emacs

[Gary Wessle]

Hi python users

I am using emacs and python-mode.el under dabian testing.
is there a way to debug python code where I can step over each line
and watch the value of all the variables and be able to change
any during debugging. say you have a loop structure and want to see
what the values of your variables are during debugging when your code
is running as you step line by line.

thanks