code: def set_value(self, index, value):
          
          self._data[ self.keys[index.row()] ] = value
          self.showndata[ self.keys[index.row()] ] = value
          self.sizes[index.row()] = get_size(value)
          self.types[index.row()] = get_human_readable_type(value)
          self.sig_setting_data.emit()
docs: Set value