SanicMongo is a simple-to-use, declarative-style, document-object mapper that puts together the nice MongoEngine API and the clever Motor asynchronous approuch to create a awesome library for asynchronous access to MongoDB using python 3.5+. It's currently being used as an Async Mongo driver for Sanic web framework.
This is almost a clone of MongoMotor with no Tornado dependency.
Take a look at the full documentation.