[Python-Dev] Changing semantics of issubclass when accepting atuple

[Greg Ewing]

Guido:

> It was my intention to allow nested tuples, just not insanely deeply
> nested tuples.  The imagined use case was having names for types or
> groups of types, and being able to combine these without having to
> know whether a name refers to a type or a group.

The same effect could be achieved by defining a class...

  class my_favourite_types(float, complex):
    pass

  if isinstance(x, (int, long, my_favourite_types)):
    ...

Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	   | A citizen of NewZealandCorp, a	  |
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