Did you ever actually read mongo db code? I had to, and only the drivers, but when I learned that the C++ driver would just nope out of town in some cases and literally exit() the application, I made the decision to get rid of that stuff ASAP. There are other instances, pymongo cannot be forked, for instance. Good luck using it inside celery. The connection string parsing is another matter. All in all their driver's code looks good at the surface, everything documented etc. But the comments are more or less superfluous and the design is a mess.