from selenium import webdriver

 import time

 driver = webdriver.PhantomJS(executable_path="D:/phantomjs/bin/phantomjs.exe")

 driver.get("http://study.163.com/course/courseMain.htm?courseId=1002810012")

 time.sleep(4)

 data = driver.find_element_by_id('j-coursehead').text

 a = data.find('\n')

 b = data[a + 1:].find('\n')

 num = data[a + 1:a + 1 + b]

 driver.quit()

 print('网易云课堂的销量为：',num)