python selenium link-text点击报错

glf1588

代码:
#!/usr/bin/env python
#-*-coding=utf-8
import time
from selenium import webdriver
browser=webdriver.Firefox()
browser.get("https://10.101.139.129")
browser.find_element_by_id("userName").send_keys("admin")
browser.find_element_by_id("authenticateFormID_password").send_keys("admin")
browser.find_element_by_class_name("dinl").click()
browser.find_element_by_class_name("top_right_menu").click()
browser.find_element_by_link_text('Teacherview_1').click()
print '[Note:]browser will quit in 10 seconds'
time.sleep(10)
browser.quit()


firebug抓取：
<a href="#" class="yuimenuitemlabel">Teacherview_1</a>

报错信息：
selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element: {"method":"link text","selector":"Teacherview_1"}

怎么就报错呢，麻烦帮忙解释下，万分感谢

joykao

太快了没抓取到对象？加个等待试试？