code: def get(self, cls, rid):
          
          self.validate_record_type(cls)
          rows = self.db.select(cls, where={ID: rid}, limit=1)
          if not rows:
              raise KeyError('No {} record with id {}'.format(cls, rid))
          return rows[0]
docs: Return record of given type with key `rid`
  
          >>> s = teststore()
          >>> s.create('tstoretest', {'id': '1', 'name': 'Toto'})
          >>> r = s.get('tstoretest', '1')
          >>> r['name']
          'Toto'
          >>> s.get('badcls', '1')
          Traceback (most recent call last):
              ...
          ValueError: Unsupported record type "badcls"
          >>> s.get('tstoretest', '2')
          Traceback (most recent call last):
              ...
          KeyError: 'No tstoretest record with id 2'