[Python-ideas] More classical for-loop

[Mikhail V]

On 17 February 2017 at 04:59, Chris Angelico <rosuav at gmail.com> wrote:

> On Fri, Feb 17, 2017 at 2:13 PM, Mikhail V <mikhailwas at gmail.com> wrote:
> > Common use case:
> >
> > L = [1,3,5,7]
> >
> > for i over len(L):
> >    e = L[i]
> >
> > or:
> >
> > length = len(L)
> > for i over length:
> >    e = L[i]
>
> Better use case:
>
> for i, e in enumerate(L):
>
>
This would be more compact, yet less readable, more error prone variant.
I'd avoid it it all costs and even if I don't need the index further in
loop body,
(which happens rarely in my experience) I write e=L[i] in second line
to make the code more verbose and keep the flow order.
So your variant (and those proposed in PEP-212) could serve in list
comprehensions for example, but for common 'expanded' code  I find it
decline of readability, and creating totally different variants for same
iteration idea.
But partially that could be simply matter of habit and love to contractions.

Mikhail
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