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# Python3.x Python MongoDB MongoDB is currently one of the most popular NoSQL databases, using the BSON data type (similar to JSON). You can check our (#) for MongoDB database installation and introduction. * * * ## PyMongo Python needs a MongoDB driver to connect to MongoDB. Here we use the PyMongo driver to connect. ### pip Installation pip is a universal Python package management tool that provides functions for finding, downloading, installing, and uninstalling Python packages. Install pymongo: $ python3 -m pip3 install pymongo You can also specify the version to install: $ python3 -m pip3 install pymongo==3.5.1 Update pymongo command: $ python3 -m pip3 install --upgrade pymongo ### easy_install Installation Older versions of Python can use easy_install to install, which is also a Python package management tool. $ python -m easy_install pymongo Update pymongo command: $ python -m easy_install -U pymongo ### Testing PyMongo Next, we can create a test file `demo_test_mongodb.py` with the following code: ## demo_test_mongodb.py File Code: #!/usr/bin/python3 import pymongo Execute the above code file. If no errors appear, the installation was successful. * * * ## Creating a Database ### Creating a Database To create a database, you need to use the `MongoClient` object and specify the connection URL and the database name to create. In the following example, we create the database `tutorialdb`: ## Example #!/usr/bin/python3 import pymongo myclient = pymongo.MongoClient("mongodb://localhost:27017/")mydb = myclient > **Note:** In MongoDB, a database is only created after content is inserted! This means that after creating a database, you must create a collection (table) and insert a document (record) for the database to be truly created. ### Checking if a Database Exists We can read all databases in MongoDB and check if a specific database exists: ## Example #!/usr/bin/python3 import pymongo myclient = pymongo.MongoClient('mongodb://localhost:27017/')dblist = myclient.list_database_names()# dblist = myclient.database_names() if"tutorialdb"in dblist: print("Database already exists!") > **Note:** `database_names` is deprecated in the latest versions of Python. For Python 3.7+, it has been changed to `list_database_names()`. * * * ## Creating a Collection A collection in MongoDB is similar to a table in SQL. ### Creating a Collection MongoDB uses the database object to create a collection, as shown in the example below: ## Example #!/usr/bin/python3 import pymongo myclient = pymongo.MongoClient("mongodb://localhost:27017/")mydb = myclientmycol = mydb > **Note:** In MongoDB, a collection is only created after content is inserted! This means that after creating a collection (table), you must insert a document (record) for the collection to be truly created. ### Checking if a Collection Exists We can read all collections in a MongoDB database and check if a specific collection exists: ## Example #!/usr/bin/python3 import pymongo myclient = pymongo.MongoClient('mongodb://localhost:27017/')mydb = myclient['tutorialdb']collist = mydb. list_collection_names()# collist = mydb.collection_names()if"sites"in collist: # Check if the 'sites' collection exists print("Collection already exists!") > **Note:** `collection_names` is deprecated in the latest versions of P