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Groups > comp.lang.python > #17188

Re: boolean from a function

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On 12/13/2011 11:37 PM, Steven D'Aprano wrote:
>
> x is a global? Poor design. But in any case, instead of an explicit
> if...else block, the canonical way to convert an arbitrary object to True/
> False is with bool:
>
> def func_bool():
>      return bool(x)
>
> But you don't need it. See below.
>
>
>
No no it was just to show the pattern, it wasn't the actual code.
I don't like to have useless indirections, so I wouldn't do that...

I like the idea of the property (from Duncan Booth) but the thing is 
that that function
looks like it's doing something (from its name), it's not just a simple 
property.

In the case of the square

class Sq(object):
      def __init__(self, x, y):
            self.x = x
            self.y


It makes perfect sense to have "area" as a property, because you can 
either compute
it and cache it or compute it on demand.
It feels a bit less natural to create a property on something that is 
less simple than that imho..

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boolean from a function Andrea Crotti <andrea.crotti.0@gmail.com> - 2011-12-13 16:24 +0000
  Re: boolean from a function Grant Edwards <invalid@invalid.invalid> - 2011-12-13 17:20 +0000
  Re: boolean from a function Duncan Booth <duncan.booth@invalid.invalid> - 2011-12-13 17:42 +0000
  Re: boolean from a function Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-13 23:37 +0000
    Re: boolean from a function Andrea Crotti <andrea.crotti.0@gmail.com> - 2011-12-14 09:42 +0000

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