mypy AbstractMatchInfo has no attribute "route"

[Dreamsorcerer]

When running mypy, I get the error:
error: "AbstractMatchInfo" has no attribute "route" [attr-defined]

From this code:

        match_info = await request.app.router.resolve(request_clone)
        if isinstance(match_info.route, web.ResourceRoute):

But, looking at the code, it looks to me like everything is actually returning a UrlMappingMatchInfo, which does have this attribute.

Would it make sense to just change the return to UrlMappingMatchInfo? I can't see why you would get another type returned from this function.

[asvetlov]

Sorry for the late response.

Historically, I thought that AbstractMatchInfo can work with custom URL resolvers in additional to the default UrlDispatcher.
For example, sometimes a traversal-based resolver can look attractive.

The idea has failed for several reasons but the ABC class was not updated.
Please feel free to publish a PR.