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

     def select_from_list(self, locator, *items):
         """Selects `*items` from list identified by `locator`

         If more than one value is given for a single-selection list, the last
         value will be selected. If the target list is a multi-selection list,
         and `*items` is an empty list, all values of the list will be selected.

         *items try to select by value then by label.

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

         An exception is raised for a single-selection list if the last
         value does not exist in the list and a warning for all other non-
         existing items. For a multi-selection list, an exception is raised
         for any and all non-existing values.

         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.
         """
         non_existing_items = []

         items_str = items and "option(s) '%s'" % ", ".join(items) or "all options"
         self._info("Selecting %s from list '%s'." % (items_str, locator))

         select = self._get_select_list(locator)

         if not items:
             for i in range(len(select.options)):
                 select.select_by_index(i)
             return

         for item in items:
             try:
                 select.select_by_value(item)
             except:
                 try:
                     select.select_by_visible_text(item)
                 except:
                     non_existing_items = non_existing_items + [item]
                     continue

         if any(non_existing_items):
             if select.is_multiple:
                 raise ValueError("Options '%s' not in list '%s'." % (", ".join(non_existing_items), locator))
             else:
                 if any (non_existing_items[:-1]):
                     items_str = non_existing_items[:-1] and "Option(s) '%s'" % ", ".join(non_existing_items[:-1])
                     self._warn("%s not found within list '%s'." % (items_str, locator))
                 if items and items[-1] in non_existing_items:
                     raise ValueError("Option '%s' not in list '%s'." % (items[-1], locator))

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

相似方法：

公共方法 选中所传入items,如果给了多个值，并且是single-selection list，则最后一值会被选中；如果是 multi-selection list，并且items为空，则所有options都会被选中

接收参数：locator，*items(labels/values)

26行：使用_get_select_list(self, locator)方法，返回Select对象