Boolean tests [was Re: Attack a sacred Python Cow]

[Erik Max Francis]

Russ P. wrote:

> On Jul 29, 11:36 pm, Erik Max Francis <m... at alcyone.com> wrote:
>> Russ P. wrote:
>>> Come to think of it, shouldn't the list type have an "isempty" method?
>>> Or does it?
>> Yes.  It's written:
>>
>>         if not aList:
>>             ...
> 
> As you know, that is not quite exactly the same thing. An "isempty"
> method would fail if aList were an integer, and such failure might be
> desirable if someone mistakenly had aList pointing to an integer.

If you're that concerned about what the type is, then you can do 
explicit typechecks.  Those are discouraged precisely because of 
Python's dynamism.  But knock yourself out.

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