Selenium2Library系列 keywords 之 _SelectElementKeywords 之 unselect_from_list(self, locator, *items)

     def unselect_from_list(self, locator, *items):
         """Unselects given values from select list identified by locator.

         As a special case, giving empty list as `*items` will remove all
         selections.

         *items try to unselect by value AND by label.

         It's faster to use 'by index/value/label' functions.

         Select list keywords work on both lists and combo boxes. Key attributes for
         select lists are `id` and `name`. See `introduction` for details about
         locating elements.
         """
         items_str = items and "option(s) '%s'" % ", ".join(items) or "all options"
         self._info("Unselecting %s from list '%s'." % (items_str, locator))

         select = self._get_select_list(locator)
         if not select.is_multiple:
             raise RuntimeError("Keyword 'Unselect from list' works only for multiselect lists.")

         if not items:
             select.deselect_all()
             return

         select, options = self._get_select_list_options(select)
         for item in items:
             select.deselect_by_value(item)
             select.deselect_by_visible_text(item)

方法名：unselect_from_list(self, locator, *items)

相似方法：

公共方法 移除所给items的选中状态

接收参数：locator，*labels/*values

18行：使用_get_select_list(self, locator)方法，返回Select对象