old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from riak import RiakClient
  
  from mining.utils import conf
  
  
  class Riak(object):
      def conn(self):
          """Open connection on Riak DataBase"""
          client = RiakClient(
              protocol=self.conf.get("protocol"),
              http_port=self.conf.get("port"),
              host=self.conf.get("host"))
  
          conn = client.bucket(self.conf.get("db"))
          conn.enable_search()
          return conn
  
      def save(self, house, data, content_type="application/json"):
          """Save meta dada on Riak"""
          return self.conn().new(house, data=data,
                                 content_type=content_type).store()
  
      def get(self, house, callback={}):
          """Get bucket"""
          return self.conn().get(house).data or callback
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from riak import RiakClient
  
  
  class Riak(object):
      def conn(self):
          """Open connection on Riak DataBase"""
          client = RiakClient(
              protocol=self.conf.get("protocol"),
              http_port=self.conf.get("port"),
              host=self.conf.get("host"))
  
          conn = client.bucket(self.conf.get("db"))
          conn.enable_search()
          return conn
  
      def save(self, house, data, content_type="application/json"):
          """Save meta dada on Riak"""
          return self.conn().new(house, data=data,
                                 content_type=content_type).store()
  
      def get(self, house, callback={}):
          """Get bucket"""
          return self.conn().get(house).data or callback
  
subject: remove import not used