On 2/22/17, Steve D'Aprano <steve+pyt...@pearwood.info> wrote:
> On Wed, 22 Feb 2017 08:47 pm, Cecil Westerhof wrote:
>
>> On Wednesday 22 Feb 2017 08:49 CET, Argentinian Black ops lll wrote:
>>
>>> *** SOLVED ***
>>
>> It would be nice if you shared the solution.
>
> I believe Cameron's post contains the bones of a solution.
>
> Here's my untested solution.
>
>
> def func_cache(cache):
> # Create a decorator that uses cache.
> def decorate(function):
> @functools.wraps(function)
> def wrapper(*args):
> try:
> result = cache[args]
> except KeyError:
> result = function(*args)
> cache[args] = result
> except TypeError:
> result = function(*args)
> return result
> return wrapper
> return decorate
>
>
> @func_cache({}):
> def something(x):
> ...
Maybe this technique could be reusable (and maybe part of functools?)
With this decorator:
def wrap_args(decorator):
def decor_out(*args, **kwargs):
def decor_in(func):
return decorator(func, *args, **kwargs)
return decor_in
return decor_out
Alfredo needs to change only (*) next 2 lines:
def fun_cache(function):
memo = {}
to:
@wrap_args
def fun_cache(function, cache):
memo = cache
(*) - Steve's improvements (for example using functools.wraps) are
good to consider as well! :)
(but maybe catching TypeError could more problems hide than solve)
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