Use TypeVar to help with QObject.findChild[ren]()

[altendky]

No description provided.

[altendky]

I'm looking into the ones that take tuples of types, but if you know how to handle it...

[altendky]

This is disgusting but I don't know of a better way yet. Maybe it's worth skipping the tuple-taking overloads.

https://repl.it/@altendky/CalmSickDistributeddatabase-1

import string


upper_letters = ['T' + c for c in string.ascii_uppercase]


def create_typevars(
    names=upper_letters,
    typevar='typing.TypeVar',
    bound=None,
):
    if bound is None:
        bound_argument = ''
    else:
        bound_argument = f', bound={bound}'
    return [
        f'{name} = {typevar}("{name}"{bound_argument})'
        for name in names
    ]


def main():
    names = upper_letters[:4]
    print('\n'.join(create_typevars(names=names, bound='QObject')))

    template = 'def findChildren(self, types: typing.Tuple[{0}], name: str = ..., options: typing.Union[Qt.FindChildOptions, Qt.FindChildOption] = ...) -> typing.List[typing.Union[{0}]]: ...'

    for index in range(len(names)):
        print(template.format(', '.join(names[:index + 1])))

main()

TA = typing.TypeVar("TA", bound=QObject)
TB = typing.TypeVar("TB", bound=QObject)
TC = typing.TypeVar("TC", bound=QObject)
TD = typing.TypeVar("TD", bound=QObject)
def findChildren(self, types: typing.Tuple[TA], name: str = ..., options: typing.Union[Qt.FindChildOptions, Qt.FindChildOption] = ...) -> typing.List[typing.Union[TA]]: ...
def findChildren(self, types: typing.Tuple[TA, TB], name: str = ..., options: typing.Union[Qt.FindChildOptions, Qt.FindChildOption] = ...) -> typing.List[typing.Union[TA, TB]]: ...
def findChildren(self, types: typing.Tuple[TA, TB, TC], name: str = ..., options: typing.Union[Qt.FindChildOptions, Qt.FindChildOption] = ...) -> typing.List[typing.Union[TA, TB, TC]]: ...
def findChildren(self, types: typing.Tuple[TA, TB, TC, TD], name: str = ..., options: typing.Union[Qt.FindChildOptions, Qt.FindChildOption] = ...) -> typing.List[typing.Union[TA, TB, TC, TD]]: ...

[altendky]

Kick CI

[altendky]

ah, just travis trouble

[altendky]

Maybe I'll come back and do that fancy generated variadic generics stuff but... I think it is at least good to keep that separate regardless.