import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
myquery = { "address": "Park Lane 38" }
mydoc = mycol.find(myquery)
for x in mydoc:
  print(x)

C:\Users\My Name>python demo_mongodb_query.py
{'_id': 11, 'name': 'Ben', 'address': 'Park Lane 38'}

import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
#address greater than S:
myquery = { "address": {"$gt": "S"} }
mydoc = mycol.find(myquery)
for x in mydoc:
  print(x)

C:\Users\My Name>python demo_mongodb_query_modifier.py
{'_id': 5, 'name': 'Michael', 'address': 'Valley 345'}
{'_id': 8, 'name': 'Richard', 'address': 'Sky st 331'}
{'_id': 10, 'name': 'Vicky', 'address': 'Yellow Garden 2'}
{'_id': 14, 'name': 'Viola', 'address': 'Sideway 1633'}

import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
#address starts with S:
myquery = { "address": { "$regex": "^S" } }
mydoc = mycol.find(myquery)
for x in mydoc:
  print(x)

C:\Users\My Name>python demo_mongodb_query_regex.py
{'_id': 10, 'name': 'Richard', 'address': 'Sky st 331'}
{'_id': 14, 'name': 'Viola', 'address': 'Sideway 1633'}