Feature suggestion -- return if true

scattered tooscattered at gmail.com
Tue Apr 12 16:58:50 CEST 2011


On Apr 12, 10:05 am, Westley Martínez <aniko... at gmail.com> wrote:
> On Tue, 2011-04-12 at 12:44 +1000, Chris Angelico wrote:
> > On Tue, Apr 12, 2011 at 12:20 PM, James Mills
> > <prolo... at shortcircuit.net.au> wrote:
> > > On Tue, Apr 12, 2011 at 12:18 PM, Jason Swails <jason.swa... at gmail.com> wrote:
> > >> This is only true if n < 5.  Otherwise, the first returns None and the
> > >> second returns False.
>
> > > Which is why I said:
>
> > > return expr or None
>
> > > But hey let's argue the point to death!
>
> > That's still not equivalent. "return expr or None" will always
> > terminate the function. The OP's request was for something which would
> > terminate the function if and only if expr is non-false.
>
> > Chris Angelico
>
> def bs(x):
>     while not x:
>         <modify x>
>     return x
>
> Am I wrong here?- Hide quoted text -
>
> - Show quoted text -

I don't think that this is equivalent. The OP's original idea doesn't
involve a loop, but this does - how could that be equivalent?



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