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Concept visual
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When finding documents in a collection, you can filter the result by using a query object.
method is a query object, and is used to limit the search.
Find document(s) with the address "Park Lane 38":
Formula
import pymongo myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]myquery = { "address": "Park Lane 38" }Formula
mydoc = mycol.find(myquery)
for x in mydoc:print(x)To make advanced queries you can use modifiers as values in the query object. E.g. to find the documents where the "address" field starts with the letter "S" or higher (alphabetically), use the greater than modifier:
{"$gt": "S"}Find documents where the address starts with the letter "S" or higher:
Formula
import pymongo myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]myquery = { "address": { "$gt": "S" } }Formula
mydoc = mycol.find(myquery)
for x in mydoc:print(x)You can also use regular expressions as a modifier. Regular expressions can only be used to query strings. To find only the documents where the "address" field starts with the letter "S", use the regular expression
{"$regex": "^S"}Find documents where the address starts with the letter "S":
Formula
import pymongo myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]myquery = { "address": { "$regex": "^S" } }Formula
mydoc = mycol.find(myquery)
for x in mydoc:print(x)