code: def append(self, v):
          '''add a new setting'''
          if isinstance(v, MPSetting):
              setting = v
          else:
              (name,type,default) = v
              label = name
              tab = None
              if len(v) > 3:
                  label = v[3]
              if len(v) > 4:
                  tab = v[4]
              setting = MPSetting(name, type, default, label=label, tab=tab)
  
          # when a tab name is set, cascade it to future settings
          if setting.tab is None:
              setting.tab = self._default_tab
          else:
              self._default_tab = setting.tab
          self._vars[setting.name] = setting
          self._keys.append(setting.name)
          self._last_change = time.time(f append(self, v):
          '''add a new setting'''
          if isinstance(v, MPSetting):
              setting = v
          else:
              (name,type,default) = v
              label = name
              tab = None
              if len(v) > 3:
                  label = v[3]
              if len(v) > 4:
                  tab = v[4]
              setting = MPSetting(name, type, default, label=label, tab=tab)
  
          # when a tab name is set, cascade it to future settings
          if setting.tab is None:
              setting.tab = self._default_tab
          else:
              self._default_tab = setting.tab
          self._vars[setting.name] = setting
          self._keys.append(setting.name)
          self._last_change = time.time()
docs: add a new setting