Extended List Comprehension

[Paul Rubin]

Tim Chase <python.list at tim.thechases.com> writes:
> > You could (in 2.5) use:
> >    [(x if x%2 else 'even') for x in '1234']
> 
> This failed on multiple levels in 2.3.5 (the "if" syntax is
> unrecognized,

Yes, that syntax is new to 2.5.

> However, this worked in my 2.3.5:
>     [((x%2 == 0 and 'even') or x) for x in [-2,-1,0,1,2,3,4]]
> It uses the fairly defacto short-circuit-evaluation usage to coin a
> Python trinary operator like the C/C++ colon/question-mark pair of
> operators.

Yeah, you could do that, but there's various drawbacks, hence the new
syntax being introduced in 2.5.