- Machine Learning
- Machine Learning Tutorial
- Getting Started
- Mean Median Mode
- Standard Deviation
- Percentile
- Data Distribution
- Normal Data Distribution
- Scatter Plot
- Linear Regression
- Polynomial Regression
- Multiple Regression
- Scale
- Train-Test
- Decision Tree
- Confusion Matrix
- Hierarchical Clustering
- Logistic Regression
- Grid Search
- Categorical Data
- K-means
- Bootstrap Aggregation
- Cross Validation
- AUC - ROC Curve
- K-nearest neighbors
- Python MySQL
- Python - MySQL
- MySQL Get Started
- MySQL Create Database
- MySQL Create Table
- MySQL Insert
- MySQL Select
- MySQL Where
- MySQL Order By
- MySQL Delete
- MySQL Drop Table
- MySQL Update
- MySQL Limit
- MySQL Join
- Python MongoDB
- Python - MongoDB
- MongoDB Get Started
- MongoDB Create DB
- MongoDB Collection
- MongoDB Insert
- MongoDB Find
- MongoDB Query
- MongoDB Sort
- MongoDB Delete
- MongoDB Drop Collection
- MongoDB Update
- MongoDB Limit
- Selected Reading
- Q&A
Python MongoDB Delete:
Delete Document
To delete one document, we use the
delete_one()
method.
The first parameter of the delete_one()
method
is a query object defining which document to delete.
Note: If the query finds more than one document, only the first occurrence is deleted.
Example
Delete the document with the address "Mountain 21":
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
myquery = { "address": "Mountain 21" }
mycol.delete_one(myquery)
Run example »
Delete Many Documents
To delete more than one document, use the
delete_many()
method.
The first parameter of the delete_many()
method
is a query object defining which documents to delete.
Example
Delete all documents were the address starts with the letter S:
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
myquery = { "address": {"$regex": "^S"} }
x = mycol.delete_many(myquery)
print(x.deleted_count, " documents
deleted.")
Run example »
Delete All Documents in a Collection
To delete all documents in a collection, pass an empty query object to the delete_many()
method:
Example
Delete all documents in the "customers" collection:
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
x = mycol.delete_many({})
print(x.deleted_count, " documents
deleted.")
Run example »