#!/usr/bin/python
# -*- coding: utf-8 -*-
__author__ = 'zuoanvip'
#下拉框在web页面上非常常见，对于下拉框的处理采用二次定位的方法进行元素定位：首先定位到下拉框，然后再定位下拉框的具体元素
from selenium import webdriver
import os
import time
driver = webdriver.Firefox()
file_path = 'file:///'+os.path.abspath('drop_down.html')
driver.get(file_path)
#首先定位到下拉框
drop_down = driver.find_element_by_id('ShippingMethod')
# 再点击下拉框到的选项
drop_down.find_element_by_xpath('//option[@value='10.69']').click()
time.sleep(5)
driver.quit()
============================================
drop_down.html源码
<html>
<body>
<select id="ShippingMethod" onchange="updateShipping(options[selectedIndex]);"
name="ShippingMethod">
<option value="12.51">UPS Next Day Air ==> $12.51</option>
<option value="11.61">UPS Next Day Air Saver ==> $11.61</option>
<option value="10.69">UPS 3 Day Select ==> $10.69</option>
<option value="9.03">UPS 2nd Day Air ==> $9.03</option>
<option value="8.34">UPS Ground ==> $8.34</option>
<option value="9.25">USPS Priority Mail Insured ==> $9.25</option>
<option value="7.45">USPS Priority Mail ==> $7.45</option>
<option value="3.20" selected="">USPS First Class ==> $3.20</option>
</select>
</body>
</html>