Belly Buster questions

Belly Buster answers

• bson.errors.InvalidDocument: key '$numberDecimal' must not start with '$' when using json
• pymongo.errors.ServerSelectionTimeoutError:localhost:27017:[WinError 10061]No connection could be made because the target machine actively refused it
• pymongo shows skip must be an instance of int - error
• Updating 'username' field logs user out (flask-login - MongoDB) - Class issue?
• MongoDB count total of three fields
• pymongo.errors.ConfigurationError: The "dnspython" module must be installed to use mongodb+srv:// URIs even after pymongo and dnspython installed