from selenium.webdriver import Chrome
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as ECdriver = Chrome()driver.get('http://www.baidu.com')setting_ele_xpath = '//a[@name="tj_settingicon" and @href="http://www.baidu.com/gaoji/preferences.html"]'wait = WebDriverWait(driver, 20)
e = wait.until(EC.visibility_of_element_located((By.XPATH, setting_ele_xpath)))
driver.find_element_by_xpath(setting_ele_xpath).click()locator = (By.XPATH, "//a[contains(text(), '高级搜索')]")
WebDriverWait(driver, 30).until(EC.element_to_be_clickable(locator)).click()# 通常先去定位selector，再去定位option
# wait = WebDriverWait(driver, 20)
# my_selector = wait.until(EC.element_to_be_clickable((By.NAME, 'ft')))
# my_selector.click()# 在源代码中已经加载出来了，可以直接去点击
wait = WebDriverWait(driver, 20)
my_option = wait.until(EC.element_to_be_clickable((By.XPATH, '//option[@value="ppt"]')))
my_option.click()

from selenium.webdriver import Chrome
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support.select import Select
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as ECdriver = Chrome()driver.get('http://www.baidu.com')def wait_clicl_element(driver, locator):wait = WebDriverWait(driver, 20)return wait.until(EC.element_to_be_clickable(locator))setting_ele_xpath = '//a[@name="tj_settingicon" and @href="http://www.baidu.com/gaoji/preferences.html"]'wait = WebDriverWait(driver, 20)
e = wait.until(EC.visibility_of_element_located((By.XPATH, setting_ele_xpath)))
driver.find_element_by_xpath(setting_ele_xpath).click()locator = (By.XPATH, "//a[contains(text(), '高级搜索')]")
WebDriverWait(driver, 30).until(EC.element_to_be_clickable(locator)).click()wait = WebDriverWait(driver, 20)
my_selector = wait.until(EC.element_to_be_clickable((By.NAME, 'ft')))
my_selector.click()# select选择有3种方法：索引值、value值、文本，点进源码去看
selector_obj = Select(my_selector)
selector_obj.select_by_value('pdf')
# 取消 selector_obj.deselect_by_value()print(selector_obj.options)
print(selector_obj.first_selected_option)