En Sun, 14 Dec 2008 02:40:10 -0200, Benjamin Kaplan
<benjamin.kap...@case.edu> escribió:
On Sat, Dec 13, 2008 at 10:49 PM, Daniel Fetchinson <
fetchin...@googlemail.com> wrote:
>> Is it a feature that
>>
>> 1 or 1/0
>>
>> returns 1 and doesn't raise a ZeroDivisionError? If so, what's the
>> rationale?
>
> http://en.wikipedia.org/wiki/Short-circuit_evaluation
Let me just point out that unsuspecting people (like me) might rely on
the whole expression to be evaluated and rely on exceptions being
raised if needed.
If you want both expressions evaluated, you can use & and |, just like
in C
and Java (&& and || are used for short circuit evaluation in those
languages).
No: &, | (and ^, too) perform bitwise operations in Python, C and Java:
py> 1 & 2
0
&& and || --in both C and Java-- are like `and` and `or` in Python; they
perform logical operations, and short-circuit evaluation of their operands.
If you want to evaluate a logical expression without short circuiting, do
that explicitely:
a = first part
b = second part
if a or b: ...
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
