code: def addmember(self, value):
          
  
          if value is not None and not isinstance(value, Agent):
              value = Agent(value)
  
          self._member.append(value)
docs: Adds a single member to this group's list of members.
          Tries to convert to :class:`tincan.Agent`
  
          :param value: The member to add to this group
          :type value: :class:`tincan.Agent`