code: def add_permission(self, label, aws_account_id, action_name, callback=None):
          
          return self.connection.add_permission(self, label, aws_account_id, action_name, callback=callback)
docs: Add a permission to a queue.
  
          :type label: str or unicode
          :param label: A unique identification of the permission you are setting.
                        Maximum of 80 characters ``[0-9a-zA-Z_-]``
                        Example, AliceSendMessage
  
          :type aws_account_id: str or unicode
          :param principal_id: The AWS account number of the principal who will be given
                               permission.  The principal must have an AWS account, but
                               does not need to be signed up for Amazon SQS. For information
                               about locating the AWS account identification.
  
          :type action_name: str or unicode
          :param action_name: The action.  Valid choices are:
                              \*|SendMessage|ReceiveMessage|DeleteMessage|
                              ChangeMessageVisibility|GetQueueAttributes
  
          :rtype: bool
          :return: True if successful, False otherwise.