考虑到以下情况
项目列表类:
# filename: item_list.py
# locators dictionary is intentionally placed outside `ItemList` class
locators = {
'item_id': 'css=tr:nth-of-type({item_num}) .id',
'item_title': 'css=tr:nth-of-type({item_num}) .alert-rules',
# other properties
}
class ItemList(Item):
# --- these are data descriptors ---
# getting item_id value based on its item_num
item_id = TextReadOnly(locators['item_id'].format(item_num=self.item_num))
# getting item_title value based on its item_num
item_title = TextReadOnly(locators['item_title'].format(item_num=self.item_num))
def __init__(self, context, item_num=0):
# self.item_num can't be passed to locators
self.item_num = item_num
super(ItemList, self).__init__(
context
)
在本例中,我想将self.item_num
值传递给ItemList
类中定位器字典内的item_num
。在
原因是我希望item_id
和{item_num
。在
我被困在这件事上:
^{pr2}$当已生成实例时,self.item_num
值不能传递给定位器。在
实施:
# filename: test.py
# print item_id values from item_num=1
item_1 = ItemList(context, 1)
print (‘Item_id_1: ’ + item_1.id)
# print item_id values from item_num=2
item_2 = ItemList(context, 2)
print (‘Item_id_2: ’ + item_2.id)
# ^ no result produced from item_1.id and item_2.id because self.item_num value can't be passed to locators
是否可以从实例变量更新数据描述符?在
如何将实例变量值传递给数据描述符参数?在
其他信息:
我试图调用item_id
和{
项目类别:
# filename: item.py
import abc
class Item(Page):
__metaclass__ = abc.ABCMeta
def __init__(self, context):
self.__context = context
super(Item, self).__init__(
self.__context.browser
)
描述符:
# filename: text_read_only.py
class TextReadOnly(object):
def __init__(self, locator):
self.__locator = locator
def __get__(self, instance, owner=None):
try:
e = instance.find_element_by_locator(self.__locator)
except AttributeError:
e = instance.browser.find_element_by_locator(self.__locator)
return e.text
def __set__(self, instance, value):
pass
我找到了this article,并想出了将描述符添加到对象中的解决方案。在
下面的解决方案对我有效:
{{cd2>添加到类中
将class属性移动到ItemList构造函数中的instance属性
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