python 中的selenium 点击后匹配报错

Question

  click_link=self.driver.find_element_by_xpath('//form[@id="form"]').click()
                # time.sleep(5)
                link=self.driver.find_element_by_xpath('//form/input[4]/@value')

报错如下
selenium.common.exceptions.InvalidSelectorException: Message: invalid selector: The result of the xpath expression "//form/input[4]/@value" is: [object Attr]. It should be an element.
(Session info: headless chrome=66.0.3359.181)

Answer 1

link=self.driver.find_element_by_xpath('//form/input[4]/@value')

去掉@value，定位到元素就行，不用获取值