[pygtk] Subclassing pangocairo.CairoContext

[Phil Fazio]

Hello list:

I have been writing an application where I would like to subclass 
pangocairo.CairoContext, and add a few additional functions.  However, 
when I attempt to run this code:

  class MyContext(pangocairo.CairoContext):

I get the error message:

  TypeError: Error when calling the metaclass bases
      type 'pangocairo.CairoContext' is not an acceptable base type

Being relatively new to object-oriented programming, I am wondering if I 
am doing something incorrect, but changing pangocairo.CairoContext to 
cairo.Context appears to eliminate the error message.
Thanks for any help! :-)

Phil