webdriver(处理select下拉框元素)

 1 """处理下拉框"""
 2 
 3 from selenium import webdriver
 4 from selenium.webdriver.common.by import By
 5 from selenium.webdriver.support.ui import WebDriverWait
 6 from selenium.webdriver.support import expected_conditions as ES
 7 from selenium.webdriver.common.action_chains import ActionChains
 8 from selenium.webdriver.support.select import Select
 9 import time
10 
11 
12 def elementFind(driver, way, str):
13     """
14     封装具有等待时间加判断的定位方法
15     :param driver:
16     :param way: 定位方式
17     :param str: 要定位的元素
18     :return:
19     """
20     try:
21         element = WebDriverWait(driver, 5, 0.5).until(ES.presence_of_element_located((way, str)))
22         return element
23     except:
24         return False
25 
26 
27 driver = webdriver.Chrome()
28 driver.get("http://www.baidu.com")
29 
30 el = elementFind(driver, By.LINK_TEXT, '设置')
31 ActionChains(driver).move_to_element(el).perform()
32 
33 time.sleep(1)
34 driver.find_element(By.CSS_SELECTOR, '.setpref').click()
35 
36 """
37 1 select_by_index          # 通过索引定位
38 2 select_by_value          # 通过value值定位
39 3 select_by_visible_text   # 通过文本值定位
40 """
41 time.sleep(1)
42 s = driver.find_element_by_css_selector("#nr")
43 Select(s).select_by_value('50')
44 
45 # 二次定位方式
46 time.sleep(1)
47 driver.find_element_by_id("nr").find_element_by_xpath("//option[@value='20']").click()
48 
49 time.sleep(3)
50 driver.quit()
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