introspection question: get return type

[bearophileHUGS at lycos.com]

On the other hand, generally good programming practice suggests you to
write functions that have a constant return type. And in most programs
most functions are like this. This is why ShedSkin can indeed infer
the return type of functions in "good behaved" programs. To do this
ShedSkin uses a quite refined (and slow if written in Python) type
inference algorithm.

Bye,
bearophile