SQLAlchemy[1] is a large project with a very solid codebase; it is very well documented and the API is exemplary.<p>1: <a href="https:&#x2F;&#x2F;github.com&#x2F;zzzeek&#x2F;sqlalchemy&#x2F;" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;zzzeek&#x2F;sqlalchemy&#x2F;</a>