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I am trying to connect mongodb using pymongo. I see two classes to connect to mongodb.
MongoClient and Connection.
What is the difference of these two classes?
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The use of the PyMongo driver with MongoClient class makes it easier to code and connect to MongoDB easily and quickly. MongoClient is a part of the PyMongo library and it can be imported to the Python code using the “ from pymongo import MongoClient “.
class pymongo.mongo_client. MongoClient (host='localhost', port=27017, document_class=dict, tz_aware=False, connect=True, **kwargs) ¶ Client for a MongoDB instance, a replica set, or a set of mongoses. The client object is thread-safe and has connection-pooling built in.
MongoClient (host='localhost', port=27017, document_class=dict, tz_aware=False, connect=True, **kwargs) ¶ Client for a MongoDB instance, a replica set, or a set of mongoses. The client object is thread-safe and has connection-pooling built in.
Similarly, you can also install PyMongo 3.8 using PIP for Python 3 by executing the command in the python3 environment: 1 sudo python3 -m pip install pymongo == 3.8.0 NOTE: As of June 2019, PyMongo version 3.8 is the latest stable release of the Python driver.
MongoClient is the preferred method of connecting to a mongo instance. The Connection class is deprecated. But, in terms of use they are very similar.
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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
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