I need to save a file to a NoSQL Database using python. Which libraries could be useful/ how should I go about this?
There is no single standard driver for NoSql databases. Most NoSql database have native python driver and other 3rd party driver. 
For MongoDB : Pymongo is the native python library/driver. 
Monogoengine is a good option if you are looking for something like an orm.
Importing & saving a file to a NOSQL Database with Python