periodic_table.py 文件源码

def deselect_element(self, element):
        """
        Show an element as being de-selected.
        """

        widget = self._get_element_widget(element)
        widget.setStyleSheet("QPushButton { font-weight: normal; }")

        try:
            self._selected_elements.remove(element)

        except ValueError:
            None

        if len(self._selected_elements) == 0 and self.multiple_select:
            self.btn_ok.setEnabled(False)

        return None