python gui builders

[me]

Good People

I do not write stuff for humans, as it has been my job to remove 
humans from the loop. But I have to make a front end to a 
component database where everything was built in Python.

I have looked at the Tk stuff that is built into Python -> not 
acceptable. So looking at wxGlade, Boa Constructor, Python Card. 
Also looked at the frames/forms created with QtDesigner, which 
can be used by Python via pyuic. BlackAdder IDE seems to have 
this built-in, but am loathe to buy into another GUI tool for a 
single job.

I have not been able to find a decent Python gui builder. The 
last time I did gui garbage was with Borland C++ Builder which 
was ok because I was only using win boxen for that project. This 
time I am using both Linux and Win.

What Python gui builder is well supported, does not require me 
to learn another framework/library, and can crank out stuff for 
multiple platforms ?

thanks much,
me