En Sat, 31 Jan 2009 10:16:19 -0200, AJ Ostergaard <a...@cubbyhole.net>
escribió:
Hi Ralf,
Thanks for that but why:
>>> '' and True
''
Surely that should be False?!?
Python does "short-circuit evaluation" [1]
"and" and "or" return one of its operands as soon as the outcome is
determined, not just True or False.
'' is a false value, as false as False itself :)
After seeing that, there is no point in evaluating the second operand
(True) because the final result cannot be true; so Python just returns the
first operand.
[1] http://en.wikipedia.org/wiki/Short_circuit_evaluation
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
