Atlas is MongoDB, Inc.’s hosted MongoDB as a service offering. To connect to Atlas, pass the connection string provided by Atlas to MongoClient:
client = pymongo.MongoClient(<Atlas connection string>)
Connections to Atlas require TLS/SSL. For connections using TLS/SSL, PyMongo may require third party dependencies as determined by your version of Python. With PyMongo 3.3+, you can install PyMongo 3.3+ and any TLS/SSL-related dependencies using the following pip command:
$ python -m pip install pymongo[tls]
Earlier versions of PyMongo require you to manually install the dependencies. For a list of TLS/SSL-related dependencies, see TLS/SSL and PyMongo.