On Fri, Aug 23, 2019 at 10:18 AM Cameron Simpson <c...@cskk.id.au> wrote:
> As Michael says, "you can always read from a parent scope if the name
> hasn't been used by the local scope". What this means is this:
>
> _MODULE_LEVEL_CACHE = {}
>
> def factors_of(n):
> factors = _MODULE_LEVEL_CACHE.get(n)
> if factors is None:
> factors = factorise(n)
> _MODULE_LEVEL_CACHE[n] = factors
> return factors
Note that this is still using a global variable, even though it isn't
using the "global" keyword. The two concepts are related but distinct.
ChrisA
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