coding:utf-8
from selenium import webdriver

def open_beowser(name,url):
if name == 'Chrome':
driver = webdriver.Chrome()
if name == 'fox':
driver = webdriver.Firefox()
if name == 'IE':
driver = webdriver.IE()
driver.get(url)
driver.maximize_window()
return driver

class TestKeys():
def init(self,name,url):
self.driver = open_beowser（name,url)

另一个文件调用的时候说driver在没有赋值前引用了,求大神帮忙看下 。