Transparent Window Background (Python Tkinter)

What I need is a tkinter window that is transparent,

but with a image displayed on this window 开发者_StackOverflow中文版is not.

I've seen the

w.attributes('-alpha', 0.1)

thing, but that makes the image transparent as well.

I need just the background of the window transparent,

so that an image on the window that has transparent parts,

will show the Users desktop through these parts.

Are there anyways to do this in Python?

(specs:

Python 2.7.1

Tkinter

PhotoImage

Windows7)

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I would suggest another ui library

pretty much a duplicate to Is it possible to create a Tkinter Window with no frame, and no background?

I just learnt that pygame don't support window transparency but according to the last post here wxPython does if that's an option

more links:
draws under windows over desktop(you can adapt I think) Discussion about various ways to implement