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I've been looking through PEP 612 but I just wasn't able to find any way to implement behavior that would allow me to do this:
P=ParamSpec("P")
R=TypeVar("R")
deffoo(f: Callable[P, R]) ->Callable[P, List[R]]: # Here, the parameters are actually P + optional kw-only int x = 3definner(*args: P.args, x: int=3, **kwargs: P.kwargs) ->List[R]:
results= []
for_inrange(x):
ret=f(*args, **kwargs)
results.append(ret)
returnresultsreturninner@foodefbar(p: int):
returnp+2bar(5) # Acceptablebar(5, x=8) # Should also be Acceptable
Proposed solution:
Callable[[P.args, x: int=3, P.kwargs], List[R]]
EDIT: I didn't notice that this was already in rejected alternatives section (I didn't scroll that far), however I still think an implementation like this would be worth adding since I have already encountered the need for this twice and there's simply absolutely no way to handle it.
I'm fine with the proposed syntax suggestion of
Concatenate[("x", int), P]
Though it didn't mention anything about default values, but those could just be handled by a third value in that tuple. It would probably be a lot easier to implement than my proposed suggestion, though to be fair, at least to me, my suggestion looks a bit cleaner.
The text was updated successfully, but these errors were encountered:
I've encountered this as well. In particular, I'm trying to recreate a decorator for a React-like framework in Python. I have a decorator that, given a user's function, returns a new function that accepts all the arguments of the one give, but with extra arguments that the decorator itself consumes and does not pass on. This would look a bit like this:
One point of note is that I need (str | None, "key") to be a keyword-only arg. The syntax suggested in the PEP seems to concatenate a keyword or positional argument. Perhaps, placing it after the ParamSpec in the concatenation could indicate a keyword-only argument?
I've been looking through PEP 612 but I just wasn't able to find any way to implement behavior that would allow me to do this:
Proposed solution:
EDIT: I didn't notice that this was already in rejected alternatives section (I didn't scroll that far), however I still think an implementation like this would be worth adding since I have already encountered the need for this twice and there's simply absolutely no way to handle it.
I'm fine with the proposed syntax suggestion of
Though it didn't mention anything about default values, but those could just be handled by a third value in that tuple. It would probably be a lot easier to implement than my proposed suggestion, though to be fair, at least to me, my suggestion looks a bit cleaner.
The text was updated successfully, but these errors were encountered: