i have just received a task to implement a software that paints over pictures (pretty much like microsoft paint )
i have no idea where to start or how to do that. do anyone have a good reference or idea for painting in qt or pyqt ?

this will be highly appreciated 
thanks in advance
Have you looked at the scribble example included in PyQt? It does basic drawing, saving, loading, etc.
making paint in pyqt or qt