code: def get_first_recipient_with_address(self):
          
          recipients_with_address = [recipient for recipient in self._recipients
                                     if recipient.address]
          if recipients_with_address:
              return recipients_with_address[0]
          else:
              return None
docs: Returns the first recipient found with a non blank address
  
          :return: First Recipient
          :rtype: Recipient