new_contents: """
  
  Module for saving, loading  and updating MongoDB
  """
  
  import pymongo
  
  def save_to_mongo(data, mongo_db, mongo_db_coll, **mongo_conn_kw):
      """Saves data to Mongo"""
      client = pymongo.MongoClient(**mongo_conn_kw)
      db = client[mongo_db]
      coll = db[mongo_db_coll]
      return coll.insert(data)
  
  def load_from_mongo(mongo_db, mongo_db_coll, return_cursor=False,
                      criteria=None, projection=None, **mongo_conn_kw):
      """Loads data from Mongo"""   
      client = pymongo.MongoClient(**mongo_conn_kw)
      db = client[mongo_db]
      coll = db[mongo_db_coll]
  
      if criteria is None:
          criteria = {}
      
      if projection is None:
          cursor = coll.find(criteria)
      else:
          cursor = coll.find(criteria, projection)
  
      if return_cursor:
          return cursor
      else:
          return [ item for item in cursor ]
      
  def update_mongo(update, mongo_db, mongo_db_coll, criteria=None, upsert=False, multi=False, **mongo_conn_kw):
     """Updates Mongo""" 
     client = pymongo.MongoClient(**mongo_conn_kw)
     db = client[mongo_db]
     coll = db[mongo_db_coll]
     
     if criteria is None:
          criteria = {}
  #   
     return coll.update(criteria, update, upsert=upsert, multi=multi)
  
subject: Create mongo_db.py