code: def get_characteristic_from_uuid(self, uuid):
          
  
          if uuid in self.uuid_chars:
              logger.debug('Returning cached info for char: {}'.format(uuid))
              return self.uuid_chars[uuid]
  
          for service in self.services.values():
              char = service.get_characteristic_by_uuid(uuid)
              if char is not None:
                  self.uuid_chars[uuid] = char
                  logger.debug('Found char for UUID: {}'.format(uuid))
                  return char
  
          logger.info('Failed to find char for UUID: {}'.format(uuid))
          return None
docs: Given a characteristic UUID, return a :class:`Characteristic` object
          containing information about that characteristic
  
          Args:
              uuid (str): a string containing the hex-encoded UUID
  
          Returns:
              None if an error occurs, otherwise a :class:`Characteristic` object