[jackpirate]

I think you neglected the line in front of it, which does define FooBase.

   1. >>> FooBase = type("FooBase", (object,), {})  
   2. >>> Foo = type("Foo", (FooBase,), {'bar' : 42})  

Although I am not a python expert, so you may be right... in which case, how does line one not work?

[irahul]

I stand corrected - I was skimming and didn't notice. The example is correct - I was wrong.