#coding=utf-8
from selenium import selenium
import unittest, time, re
class serc(unittest.TestCase):
    def setUp(self):
        self.verificationErrors = []
        self.selenium = selenium("localhost", 4444,"*chrome","http://www.baidu.com/")
        self.selenium.start()
    def test_serc(self):
        sel = self.selenium
        sel.open("/")
        sel.type("id=kw","selenium grid")
        sel.click("id=su")
        sel.wait_for_page_to_load("30000")
    def tearDown(self):
        self.selenium.stop()
        self.assertEqual([],self.verificationErrors)
if __name__ == "__main__":
    unittest.main()

服务已经开启

但是第二行导入包时报错，求助请问要如何解决