2.2 features

[Gustavo Niemeyer]

> Ah, but there you're wrong.  Classes are also instances (of the
> metaclass), and when we don't know anything about an object X, after
> knowing that "X in Foo" is true, we would still not know whether X was
> a Foo subclass or a Foo instance.  Very different beasts.

I'm starting to like the is{subclass,instance}() version. It's probably
quicker for one to understand code written by others, and for
non-fulltime-python-programmers to remember what "in" means in each
context.

-- 
Gustavo Niemeyer

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