web.view should accept Type[AbstractView] as handler instead of AbstractView

[trim21]

Long story short

according to aiohttp's documents, web.view(path, handler) hanlder should be a class inherit from web.View

https://github.com/aio-libs/aiohttp/blob/master/aiohttp/web_routedef.py#L123

def view(path: str, handler: AbstractView, **kwargs: Any) -> RouteDef:
    return route(hdrs.METH_ANY, path, handler, **kwargs)

but type annotation means that handler should be a instance of AbstractView instead of a class.

Expected behaviour

web.view's handler annotation should be Type[AbstractView]

Actual behaviour

web.view's handler annotation should be AbstractView

Steps to reproduce

no

Your environment

server: aiohttp==3.5.4

[aio-libs-bot]

GitMate.io thinks the contributor most likely able to help you is @asvetlov.

Possibly related issues are #2098 (Web-handler cancellation), #1993 (Deprecate registering synchronous web handlers), #186 (Force aiohttp.web handlers to coroutines), #2492 (Change web handlers cancellation policy), and #931 (web.View and multiple route resolution issue).