On Thu, 16 Aug 2012 10:09:08 -0700, Richard Thomas wrote: >> a is a Foo >> b is a Foo >> therefore a and b are the same type > > What you mean here is "a and b share a common base class".
No. I mean what I said: since a and b are both direct instances of Foo, not subclasses, they are both the same type, namely Foo. "Share a common base class" is a much weaker statement: class Foo: pass class Bar(Foo): pass a = Foo() b = Bar() Now we can see that a and b are NOT the same type, but they share a common base class, Foo. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
