Auto-recompile is a small emacs add-on that allows you to fix compilation errors faster. It does this by continuously compiling the program you are working on while you are fixing problems. It eliminates the need to explicitly start a compilation for every fix you make, and manages your compilations and error lists in the background so that all you have to do is go from error to error and fix them until the program compiles.
Pymacs is a powerful tool which, once started from Emacs, allows both-way communication between Emacs Lisp and Python. Pymacs in intended for using Python as an extension language for Emacs rather than the other way around, and this asymmetry is reflected in some design choices. Within Emacs Lisp code, one may load and use Python modules. Python functions may themselves use Emacs services and handle Emacs Lisp objects kept in Emacs Lisp space.