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

Greg Ewing greg at cosc.canterbury.ac.nz
Sun Dec 14 21:51:33 EST 2003


> 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):

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

Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	   | A citizen of NewZealandCorp, a	  |
Christchurch, New Zealand	   | wholly-owned subsidiary of USA Inc.  |
greg at cosc.canterbury.ac.nz	   +--------------------------------------+

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