[Python-ideas] PEP 572: Statement-Local Name Bindings

[Serhiy Storchaka]

28.02.18 16:14, Kirill Balunov пише:
> 2018-02-28 16:49 GMT+03:00 Serhiy Storchaka 
> <storchaka at gmail.com 
> <mailto:storchaka at gmail.com>>:
>     Other options:
> 
>          stuff = [[y, y] for y in (f(x) for x in range(5))]
> 
> 
> Why not `stuff = [[y, y] for y in map(f, range(5))]`? It is currently 
> the fastest and most readable version IMHO.

Only in this particular case. This doesn't work if the expression for 
items depends on x or if the subexpression is not a function call.