Flash cards
Review the key moves
What is the main idea behind Python MongoDB Delete Document?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
Which statement best captures the main point of this lesson?
Complete the missing token from the example code.
___ pymongoPut the learning moves in the order that makes the concept easiest to apply.
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)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.")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.")