硒（Python）-选择
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Selenium (Python) - SELECT
提问by Cudoviste
Right now my script go to page and open the second object from the drop down list, "Vijesti", before I get the error message.
现在，在收到错误消息之前，我的脚本转到页面并打开下拉列表中的第二个对象“Vijesti”。
This is the error:
这是错误：
StaleElementReferenceException: Message: Element not found in the cache - perhaps the page has changed since it was looked up
StaleElementReferenceException：消息：在缓存中未找到元素 - 可能页面自查找后已更改
From Selenium site:
从硒站点：
Thrown when a reference to an element is now “stale”. Stale means the element no longer appears on the DOM of the page. Possible causes of StaleElementReferenceException include, but not limited to:
- You are no longer on the same page, or the page may have refreshed since the element was located.
- The element may have been removed and re-added to the screen, since it was located. Such as an element being relocated. This can happen typically with a javascript framework when values are updated and the node is rebuilt.
- Element may have been inside an iframe or another context which was refreshed.
当对元素的引用现在“过时”时抛出。陈旧意味着该元素不再出现在页面的 DOM 上。StaleElementReferenceException 的可能原因包括但不限于：
- 您不再在同一页面上，或者页面可能在元素被定位后刷新。
- 该元素可能已被删除并重新添加到屏幕上，因为它已被定位。例如一个元素被重新定位。当值更新并重建节点时，这通常会发生在 javascript 框架中。
- 元素可能位于 iframe 或其他刷新的上下文中。
What I want to select each object, and open it.
我想选择每个对象，然后打开它。
This is the SELECT part from the url:
这是来自 url 的 SELECT 部分：
<select id="kategorija" name="kategorija">
<option value="0">Kategorija</option>
<option value="12">Vijesti</option>
<option value="8">Biznis</option>
<option value="5">Sport</option>
<option value="2">Magazin</option>
<option value="7">Lifestyle</option>
<option value="3">Scitech</option>
<option value="6">Auto</option>
</select>
Code:
代码：
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import Select
import time
driver = webdriver.Firefox()
driver.get("http://www.klix.ba/")
assert "Klix" in driver.title
elem = driver.find_element_by_name("q")
elem.send_keys("test")
elem.send_keys(Keys.RETURN)
select = Select(driver.find_element_by_name('kategorija'))
all_options = [o.get_attribute('value') for o in select.options]
for x in all_options:
select.select_by_value(x)
time.sleep(3)
This is the urlwhere I do my testings.
这是我进行测试的网址。
采纳答案by alecxe
The page refreshes itselfwhen an item is chosen from the dropdown.
当从下拉列表中选择一个项目时，页面会自行刷新。
You need to "refind" the selectelement on each option select:
您需要select在每个选项选择上“重新查找”元素：
select = Select(driver.find_element_by_name('kategorija'))
for index in range(len(select.options)):
select = Select(driver.find_element_by_name('kategorija'))
select.select_by_index(index)
# grab the results
