Le sam. 11 août 2018 à 10:34, Vincent Maillol <vincent.mail...@gmail.com> a
écrit :
> Hello,
>
> Currently the user defined functions are mutables, there can be existed
> python codes like this:
>
> >>> def foo():
> ... pass
> ...
> >>> if not hasattr(foo, 'partial'):
> ... foo.partial = {}
> ...
>
> Adding a new method to function object can break existing projects, but it
> is without impact with buit-in functions because they are immutables.
>
>
Or use a decorator like in the lib ?
from funcoperators import partially
@partially
def f(x, y):
return x-y
g = f.part(4)
g(5)
The mutability solution however cannot have a "self" argument :
def f(x,y):
return x-y
f.stuff = lambda self: self(5, 2)
f.stuff() # missing self
One would have to give "f".
f.partial = lambda *a, **b: functools.partial(f, *a, **b)
g = f.partial(4)
g(5)
> 2018-08-09 18:59 GMT+02:00 Michel Desmoulin <desmoulinmic...@gmail.com>:
>
>> I'd rather have functools.partial() to be added as a new method on
>> function objects.
>>
>> >
>> > fromfunctools importpartial
>> >
>> >
>> > def add(x:int,y:int)->int:
>> > returnx +y
>> >
>> >
>> > add_2 = partial(add,2)
>> >
>>
>> Would become:
>>
>> add_2 = add.partial(2)
>>
>> Nothing to change on the parser, no obscure syntax for future readers,
>> and we can get the opportunity of rewriting partial() in C as right now
>> it is amazingly way, way slower than a lambda.
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>
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