def tearDownClass(self):
     try:
         # 清空设备
         Operations().login(dataoper.readxml('login', 0, 'username'),
                           dataoper.readxml('login', 0, 'password'))
         addfac.del_fac()
     except Exception as msg:
         print msg, "Data has not been removed."
     finally:
         driver.close()
 def tearDown(self):
     try:
         # 清空sche数据
         time.sleep(2)
         WebDriver().click("byxpath", "//span[2]/span/a")
         WebDriver().click("byid", "1")
         WebDriver().click("bycss", "input.margin")
         Operations().logout()
         # 清空设备
         Operations().login(dataoper.readxml('login', 0, 'username'),
                           dataoper.readxml('login', 0, 'password'))
         addfac.del_fac()
     except Exception as msg:
         print msg, "数据不能正常清除"
     finally:
         WebDriver().close()