Idea: Allow conect setting attribute to Signal

[Czaki]

As psygnal comes from Qt which is a C++ world that does not contain the equivalent of @property or descriptors. Using property is quite popular in python projects, but connected with signals could produce a big amount of redundant code.

So maybe it could be a nice idea to allow connect a property to signal.

def property_weakref(obj: Union[weakref.ref, object], name:str) -> Tuple[weakref.ref, Callable]:
    if not isinstance(obj, weakref.ref):
        obj = weakref.ref(obj)
    def wrap(*args: Any) -> None:
        if len(args) == 1:
            setattr(obj(), name, args[0])
        else:
            setattr(obj(), name, args)

    return (obj, wrap)

and a proper modification for the connect function which allows providing tuple (obj, str) as input.

[tlambert03]

love it. dealing with setter callbacks is one of the most annoying things about using property.setter... would be great to make that case seamless

[tlambert03]

(can't decide if i think it should be a new connect method though:

emitter.connect_attr(obj, 'attr_name')

do you want to implement this? Or just happy to see it get added?