isinstance(False, int)

Steven D'Aprano steve at REMOVE-THIS-cybersource.com.au
Fri Mar 5 20:54:22 CET 2010


On Fri, 05 Mar 2010 15:01:23 -0400, Rolando Espinoza La Fuente wrote:

> On Fri, Mar 5, 2010 at 2:32 PM, mk <mrkafk at gmail.com> wrote:
>> Arnaud Delobelle wrote:
>>
>>>>>> 1 == True
>>>
>>> True
>>>>>>
>>>>>> 0 == False
>>>
>>> True
>>>
>>> So what's your question?
>>
>> Well nothing I'm just kind of bewildered: I'd expect smth like that in
>> Perl, but not in Python.. Although I can understand the rationale after
>> skimming PEP 285, I still don't like it very much.
>>
>>
> So, the pythonic way to check for True/False should be:
> 
>>>> 1 is True
> False

Why do you need to check for True/False? 

But if you need to, yes, that is one way. Another would be:

isinstance(flag, bool)

But generally, you can use any object as a flag without caring if it is 
actually True or False.




-- 
Steven



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