How to access sqlalchemy's asyncio extension?

I've tried to use sqlalchemy.ext.asyncio: I installed it using following command (like in official docs):

$ pip install sqlalchemy[asyncio]

But i got this error:

AttributeError: module 'sqlalchemy.ext' has no attribute 'asyncio'

How to install sqlalchemy's asyncio correctly?

UPD: I've also installed sqlalchemy as follows: pip install sqlalchemy

Solution

You only need to install SQLAlchemy.

Then :

from sqlalchemy.ext.asyncio import AsyncEngine

print(AsyncEngine)

works fine for me.

Adding

pip install sqlalchemy[asyncio]

is optional and only necessary if you have an unusual machine.