You can read the other functionalities on the project page :
https://pypi.org/project/funcoperators/
And if you want to solve the "can't partial from right that allows to use
the Ellipsis '...' :
# the built-in "pow" doesn't take keyword arguments, so partial can't be
used.
from funcoperators import elipartial, bracket
square = elipartial (pow, ..., 2) # = pow(something, 2)
square(3) # 9
@bracket
def f(x,y,z):
return x - y + 2 * z
r = f(1,2,3)
g = f[1, ..., 3] # g = a function with one argument: y
r = g(2)
bracket merges the concept of partiallymulti, and elipartial. Partially
Multi allowing to write f[1, 2] as a sugar for f[1][2] (which is different
than partial(f, (1,2)) ).
Le dim. 5 août 2018 à 00:18, Daniel. <[email protected]> a écrit :
> That's an awesome library! Congratulation for doing this and thanks for
> sharing!
>
> Em sáb, 4 de ago de 2018 às 13:42, Robert Vanden Eynde <
> [email protected]> escreveu:
>
>> The funcoperators lib on pypi does exactly that:
>>
>> from funcoperators import partially
>>
>> @partially
>> def add(x: int, y: int) -> int:
>> return x + y
>>
>> add_2 = add[2]
>>
>> @partiallymulti
>> def stuff(x,y,z):
>> return x - y + 2*z
>>
>> sort = partially(sorted)
>> sort_by_x = sort.key(key=lambda element: element.x)
>>
>> The ".key" means "give a keyword argument".
>> The ".val" or [] gives a positional argument.
>> The ".part" accept positional and keyword arguments.
>>
>> Le sam. 4 août 2018 à 18:03, Fabrizio Messina <[email protected]> a
>> écrit :
>>
>>>
>>> Hello, I would like to propose a new method to create a partial function.
>>>
>>> At the moment we have to load the *partial* function from the *functool*
>>> library, and apply it to an existing function, e.g.
>>>
>>> from functools import partial
>>>
>>>
>>> def add(x: int, y: int) -> int:
>>> return x + y
>>>
>>>
>>> add_2 = partial(add, 2)
>>>
>>>
>>>
>>> While partial expose the mechanism excellently its instantiation method
>>> is, at times, not very friendly, I would like to propose a syntactic sugar
>>> to create partial functions, in the case you create a partial function
>>> using *curly braces*:
>>>
>>>
>>> def add(x: int, y: int) -> int:
>>> return x + y
>>>
>>> add_2 = add{2}
>>>
>>>
>>> At the moment this causes SyntaxError so the change is retro-compatible.
>>>
>>> In the case of key word arguments we could have:
>>>
>>> sort_by_x = sort{key=lambda element: element.x}
>>>
>>>
>>> That could be good as it would be an easy way to pre-load functions
>>> without having to eagerly compute it, but without needing to pass the
>>> entire function parameters to to other scopes.
>>>
>>>
>>> # prepare the function
>>> get_sorted_users: Callable[[], Iterator[User]] = sort{users, key=lambda
>>> user: user.creation_date}
>>>
>>> # continue with job at hand
>>> ...
>>>
>>> # some where else, maybe another process
>>> sorted_users = list(get_sorted_users())
>>>
>>>
>>>
>>> Even create a factory method on the fly:
>>> @dataclass
>>> class Product:
>>> name: str
>>> category: Category
>>> price: Decimal
>>>
>>>
>>> smartphone_factory = Product{category=smartphone_category}
>>>
>>>
>>>
>>> Now all this can already be done with partial, but adding this syntactic
>>> sugar would reduce the perception of `partial` as an advanced feature,
>>> alleviating the use of closures created only for the sake of avoiding an
>>> explicit partial.
>>>
>>> In my opinion this syntactic sugar has a lot of potential adoption seen
>>> the general interest in functional programming.
>>> _______________________________________________
>>> Python-ideas mailing list
>>> [email protected]
>>> https://mail.python.org/mailman/listinfo/python-ideas
>>> Code of Conduct: http://python.org/psf/codeofconduct/
>>>
>> _______________________________________________
>> Python-ideas mailing list
>> [email protected]
>> https://mail.python.org/mailman/listinfo/python-ideas
>> Code of Conduct: http://python.org/psf/codeofconduct/
>>
>
>
> --
> “If you're going to try, go all the way. Otherwise, don't even start. ..."
> Charles Bukowski
>
_______________________________________________
Python-ideas mailing list
[email protected]
https://mail.python.org/mailman/listinfo/python-ideas
Code of Conduct: http://python.org/psf/codeofconduct/
