Untyped functions_framework.http

[racinmat]

The decorator functions_framework.http is untyped, leading to Untyped decorator makes function "main" untyped errors when using mypy.
Would it be possible to add mypy typing? Thanks.

[grant]

Sounds reasonable.

functions-framework-python/src/functions_framework/__init__.py

Line 72 in f2285f9

def http(func):

I attempted to add more types here:

#191

[christippett]

I wrote the snippet below for another project. It's pulling in the same types used by Flask, so things like the request object and expected return type for function handlers are all properly annotated and play nice with intellisense.

Given Flask is already included as a dependency in the functions framework, it might be worth piggybacking on the types defined in flask.typing

from flask.typing import RouteCallable

def http(func: RouteCallable) -> RouteCallable:
    """Decorator that registers http as user function signature type."""
    ...