请教一下driver.find_element_by_xpath怎么定位到豆瓣电影网上的三个元素，调了一个晚上调不动了

name= driver.find_element_by_xpath("//span[@property='v:itemreviewed']").text
score = driver.find_element_by_xpath("//div[@class='rating_self clearfix']/strong[@class='ll rating_num']").text
number = driver.find_element_by_xpath("//div[@class='rating_sum']/a[@class='rating_people']/span").text