def __missing__(self, key):
        if self.default_factory is None:
            raise KeyError(key)
        else:
            ret = self[key] = self.default_factory(name=key)
            return ret
def getDriver(self):
        chromeDriverExeFilePath = "cameo_res\\chromedriver.exe"
        driver = webdriver.Chrome(chromeDriverExeFilePath)
        return driver