On 2011-12-13, Andrea Crotti <andrea.crott...@gmail.com> wrote:
> Now somewhere else I had
>
> if func_bool:
> # do something
>
> I could not quite understand why it was always true, until I finally
> noticed that the () were missing. Is there some tool to avoid these
> stupid mistakes? (pylint doesn't warn me on that) I don't think I
> will ever (or almost) have to use a function as a boolean, instead of
> its return value...
FWIW, I have do use the truth value of a function (rather than it's
return value) when writing code that uses callbacks:
def foo(callback=None):
# do some stuff
if callback:
callback()
# do some more stuff
It probably would be better to use "if callback is not None:", but I
find I usually skip "is not None".
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