code: def get_messages(self, num_messages=1, visibility_timeout=None,
                       attributes=None, callback=None):
          
          return self.connection.receive_message(self, number_messages=num_messages,
                                                 visibility_timeout=visibility_timeout,
                                                 attributes=attributes, callback=callback)
docs: Get a variable number of messages.
  
          :type num_messages: int
          :param num_messages: The maximum number of messages to read from the queue.
          
          :type visibility_timeout: int
          :param visibility_timeout: The VisibilityTimeout for the messages read.
  
          :type attributes: str
          :param attributes: The name of additional attribute to return with response
                             or All if you want all attributes.  The default is to
                             return no additional attributes.  Valid values:
                             All
                             SenderId
                             SentTimestamp
                             ApproximateReceiveCount
                             ApproximateFirstReceiveTimestamp
                             
          :rtype: list
          :return: A list of :class:`boto.sqs.message.Message` objects.