wxPython or PyQt

[Serge Boiko]

Hi, guys, 
I'm a user of PyQt and I believe this library is very nice, it
supports Xft, it has very flexible signal-slots mechanism, and
enormous collection of widgets and other useful classes, but I
noticed that many projects use wxPython instead.

What are the advantages of wxPython over PyQt or it's just a matter of
licensing policies: wxPython is free on every platform it supports,
meanwhile PyQt (or Qt) is completely free only under X?

Looking forward to hearing from you.

-Serge