that it is possible to get the mouse position in wxpython using 
event.GetPosition()
however, is it possible to get the position of a mouse in a sizer? Would this work even in an expanding sizer?
Thanks.
Sizers don't work with absolute positioning. They're for relative positioning. Sizers are the best at making your layout look right across multiple platforms and themes. If you really want to be able to insert stuff at specific x-y coordinates, then don't use a sizer.
Get mouse position in sizer? wxpython