Static variables

bearophileHUGS at lycos.com bearophileHUGS at lycos.com
Thu Jan 25 02:03:55 CET 2007


Bruno Desthuilliers:
> And this let you share state between functions:
>
> def make_counter(start_at=0, step=1):
>    count = [start_at]
>    def inc():
>      count[0] += step
>      return count[0]
>    def reset():
>      count[0] = [start_at]
>      return count[0]
>    def peek():
>      return count[0]
>
>    return inc, reset, peek
>
> foo, bar, baaz = make_counter(42, -1)
> print baaz()
> for x in range(5):
>     print foo()
> print bar()
> print baaz()

An interesting solution, I have never created such grouped clorures. I
don't know if this solution is better than a class with some class
attributes plus some class methods...

Bye,
bearophile




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