code: def propose_value(self, value):
          '''
          Sets the proposal value for this node iff this node is not already aware of
          a previous proposal value. If the node additionally believes itself to be
          the current leader, an Accept message will be returned
          '''
          if self.proposed_value is None:
              self.proposed_value = value
  
              if self.leader:
                  self.current_accept_msg = Accept(self.network_uid, self.proposal_id, value)
                  return self.current_accept_msf propose_value(self, value):
          '''
          Sets the proposal value for this node iff this node is not already aware of
          a previous proposal value. If the node additionally believes itself to be
          the current leader, an Accept message will be returned
          '''
          if self.proposed_value is None:
              self.proposed_value = value
  
              if self.leader:
                  self.current_accept_msg = Accept(self.network_uid, self.proposal_id, value)
                  return self.current_accept_msg
docs: Sets the proposal value for this node iff this node is not already aware of
          a previous proposal value. If the node additionally believes itself to be
          the current leader, an Accept message will be returned