Can this be done with python?

[mephisto]

Hi guys, 

I found out python may be a good language to learn for a beginner. I
do wonder however if the following can be done in a created gui:

-have a button opening a 'open file' dialog, eg when I need a user to
search for an image

-create a tree that can be adjusted by the user (eg adding a branch)

-the gui builders, can they create windows xp style I can skin with eg
stylexp or another skinning program?

Thanks for answers :)