Comparisons and sorting of a numeric class....

Fri Jan 9 10:16:46 EST 2015

Paul Rubin <no.email at nospam.invalid>:
> Marko's suggestion
>> rv = f()
> if rv is not None:
> return rv
> rv = g()
> if rv is not None:
> return rv
> return h()
>> seems unspeakably ugly.

Well, "unspeakably" is exaggeration IMO. It is a bit lengthy but it is
crystal clear. While the "or" pattern is neat, I wouldn't make too much
of it.
> Rather than None on failure maybe f() and g() could return an empty
> list on failure, or a one-element list containing the item on success.
> That uses lists to simulate a Maybe type.
>> Then the above could go (Python 3, untested):
>> def tries():
> yield from f()
> yield from g()
> yield [h()]
> return tries().next()

I think the medicine in this case is worse than the disease.
Marko