[Python-ideas] the optional "as" statement inside "if" statements

Zachary Ware zachary.ware+pyideas at gmail.com
Sat Jun 30 16:20:14 CEST 2012

On Jun 30, 2012 9:00 AM, <fiatjaf at yahoo.com.br> wrote:
> the idea is to make an variable assignment at the same time that the
existence of that variable -- which is being returned by a function -- is
> suppose we are returning a variable from the method 'get' from the
'request' object and them making some stuff with it, but that stuff we will
only do if it exists, if not, we'll just pass, instead of writing:
> variable = self.request.get('variable')
> if variable:
>    print variable
> we could write
> if self.request.get('variable') as variable:
>    print variable
> seems stupid (or not?), but with lots of variables to process, this
pre-assignment could be very unpleasant -- especially if, as the in the
example case, very little use will be made of the tested variable.
> also, the "as" expression already exists and is very pythonic.

I like it! I've found myself annoyed by writing an if statement using the
result of a function call, then realizing "oh wait, I need a reference to
that value" and have to go back and rewrite. This would eliminate that and,
to my mind, it flows very nicely.

+1 from me.
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