pymongo: MongoClient or Connection

Question

I am trying to connect mongodb using pymongo. I see two classes to connect to mongodb.

MongoClient and Connection. 

What is the difference

Answer 1

MongoClient and Connection are similar but MongoClient was introduced (since mongodb 2.2+ onwards) to mainly support WriteConcern and other features.

Connection is depreciated, so avoid using it in future.

The first step when working with PyMongo is to create a MongoClient to the running mongod instance. Doing so is easy:

>>> from pymongo import MongoClient
>>> client = MongoClient()

The above code will connect on the default host and port. We can also specify the host and port explicitly, as follows:

>>> client = MongoClient('localhost', 27017)

Or use the MongoDB URI format:

>>> client = MongoClient('mongodb://localhost:27017/')

Reference: MongoClient Python Example