Description
🐞 Describe the bug
async def _run_app(app: Union[Application, Awaitable[Application]], *,
host: Optional[str]=None,The documentation is a bit woolly:
"host (str) – TCP/IP host or a sequence of hosts for HTTP server. Default is '0.0.0.0' if port has been specified or if path is not supplied."
('(str)' excludes 'None' and excludes 'a sequence of hosts'. Also, I don't think you mean 'sequence' literally.)
But it's clear from reading the code that an iterable of strings is planned for (along with several other types).
I would think you want Optional[Union[str, Iterable[str]]] - though given the following code it's maybe unclear if you think other types are also acceptable.
💡 To Reproduce
Write some code like this and then run it though mypy
from aiohttp.web import run_app
hosts: List[str] = ['a', 'b']
run_app(host=hosts)💡 Expected behavior
If a list of strings is acceptable, then the attribute is wrong. I'm surprised mypy didn't spot it during CI, actually.
📋 Your version of the Python
$ python --version
Python 3.6.9📋 Your version of the aiohttp/yarl/multidict distributions
$ python -m pip show aiohttp
Name: aiohttp
Version: 3.6.2$ python -m pip show multidict
Name: multidict
Version: 4.7.6$ python -m pip show yarl
Name: yarl
Version: 1.5.1