code: def set(self, name, value):
          '''set a setting'''
          if not name in self._vars:
              raise AttributeError
          setting = self._vars[name]
          oldvalue = setting.value
          if not setting.set(value):
              print("Unable to convert %s to type %s" % (value, setting.type))
              return False
          if oldvalue != setting.value:
              self._last_change = time.time()
              if self._callback:
                  self._callback(setting)
          return Truf set(self, name, value):
          '''set a setting'''
          if not name in self._vars:
              raise AttributeError
          setting = self._vars[name]
          oldvalue = setting.value
          if not setting.set(value):
              print("Unable to convert %s to type %s" % (value, setting.type))
              return False
          if oldvalue != setting.value:
              self._last_change = time.time()
              if self._callback:
                  self._callback(setting)
          return True
docs: set a setting