Pierre Quentel wrote:

> With the proposed Range class, here is an implementation of the Fibonacci
> sequence, limited to 2000 :
>
> previous = 0
> def fibo(last):
>     global previous
>     _next, previous = previous+last, last
>     return _next
>
> print(list(Range(1, 2000, fibo)))

How would you make

print(list(Range(1000, 2000, fibo)))

work?

Without that and with the `previous` global under the rug that doesn't
look range-like.

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