text: 
      # for post in posts.find():   bulk quererying.
    
      # myquery = { "address": "Valley 345" }  update collection.
      # newvalues = { "$set": { "address": "Canyon 123" } }
      # mycol.update_one(myquery, newvalues)
  
      # 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)
      # {'_id': 11, 'name': 'Ben', 'address': 'Park Lane 38'}
  