Tornado is a popular asynchronous Python web server, and MongoDB a widely used non-relational database. Alas, to connect to MongoDB from a Tornado app requires a tradeoff: You can either use PyMongo and give up the advantages of an async web server, or use AsyncMongo, which is non-blocking but lacks key features. I decided to fill the gap by writing a new async driver called Motor (for "MOngo + TO
