Authlib has an OAuth2 and OpenID Connect Provider, generic and Flask.
Bottle-OAuthlib is the simplest library to build OAuth2/OIDC Provider on top of Bottle and oauthlib
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints. It includes support for OAuth2, integrated with OpenAPI
aioauth Asynchronous OAuth 2.0 library for Python 3
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