# 首页的“新建投放计划”按钮

    new_ads_plan = (By.XPATH, "//*[text()='百度新闻']/..")

    print(type(self.new_ads_plan))

    self.driver.find_element(self.new_ads_plan).click()

运行经常报错：
selenium.common.exceptions.WebDriverException: Message: invalid argument: 'using' must be a string

    new_ads_plan = (By.XPATH, "//*[text()='百度新闻']")

    shouye = (By.XPATH, "//a[text()= '首页']")

    zanTing = (By.XPATH, "//span[text()= '删 除']")

    bianji = (By.XPATH, "//span[text()= '编 辑']")

    addSuCai = (By.XPATH, "//span[text()= '添加']")

    def isElementExists(self, *loc):

        flag = True

        try:

            for num in range(0, len(loc)):

                print(str(loc[num]))

                self.driver.find_element(*loc[num])

            return flag

        except:

            flag = False

            return flag

    # 判断元素是否显示

    def is_ElementExists(self):

        return self.isElementExists((self.new_ads_plan),

                                    (self.shouye),

                                    (self.zanTing),

                                    (self.bianji),

                                    (self.addSuCai))   

       # 此处必须将多个定位元素的入参以元祖的形式填入，每一个元素的定位参数都是一个数组。