Python MongoDB - insert_one Query

Last Updated : 12 Jul, 2025

MongoDB is a cross-platform document-oriented and a non relational (i.e NoSQL) database program. It is an open-source document database, that stores the data in the form of key-value pairs. MongoDB is developed by MongoDB Inc. and was initially released on 11 February 2009. It is written in C++, Go, JavaScript, and Python languages. MongoDB offers high speed, high availability, and high scalability.

insert_one() Method

This is a method by which we can insert a single entry within the collection or the database in MongoDB. If the collection does not exist this method creates a new collection and insert the data into it. It takes a dictionary as a parameter containing the name and value of each field in the document you want to insert in the collection.

This method returns an instance of class "~pymongo.results.InsertOneResult" which has a "_id" field that holds the id of the inserted document. If the document does not specify an "_id" field, then MongoDB will add the "_id" field and assign a unique object id for the document before inserting.

Syntax:

collection.insert_one(document, bypass_document_validation=False, session=None, comment=None)

Parameters:

'document': The document to insert. Must be a mutable mapping type. If the document does not have an _id field one will be added automatically.
'bypass_document_validation' (optional): If "True", allows the write to opt-out of document level validation. Default is "False".
'session' (optional): A class '~pymongo.client_session.ClientSession'.
'comment'(optional): A user-provided comment to attach to this command.

Example 1:

Sample database is as follows:

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Example

Output:

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Example 2: Inserting multiple values

To insert multiple values, 2 Methods can be followed:

#1: Naive Method: Using for loop and insert_one

Output:

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#2: Using insert_many method: This method can be used to insert multiple documents in a collection in MongoDB.