TypeError:“WebElement"对象不可下标

问题描述

我尝试使用 Python 在 Spotify Web Player 上按下重播按钮，但出现此错误.如何在网络播放器中按下按钮?

replay = driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")[0]重播.click()

错误:

replay = driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")[0]TypeError:WebElement"对象不可下标

这个错误信息...

TypeError 'WebElement' 对象不可下标

...表示您已将索引附加到 WebElement 不支持.

分析

只有 list 元素可以被索引.但是，在这行代码中:

replay = driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")[0]

driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button"""") 将始终返回 single WebElement.因此，您无法通过任何索引访问元素，例如[0]、[1]等作为index只能与list关联.p>

解决方案

有两种方法可以解决这个问题.

• 在第一种方法中，您可以删除 index，即 [0]，在这种情况下 replay 将是分配有通过 定位器策略 标识的第一个匹配元素，如下所示:

  replay = driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button"""")

• 在另一种方法中，您可以使用 find_elements_by_xpath() 创建一个 list，而不是使用 find_element_by_xpath() 并访问List 中的第一个元素，使用索引 [0] 如下:

  replay = driver.find_elements_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")[0]

参考

您可以在以下位置找到一些相关讨论:

• 发生异常:TypeError 'WebElement' 对象不可下标

I try to press the Replay button at Spotify Web Player with Python, but get this error. How can I press buttons in a webplayer?

replay = driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")[0]
replay.click()

Error:

replay = driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")[0]
TypeError: 'WebElement' object is not subscriptable

This error message...

TypeError 'WebElement' object is not subscriptable

...implies that you have attached an index to a WebElement which is not supported.

Analysis

Only list elements can be indexed. However, in this line of code:

replay = driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")[0]
        

driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""") would always return a single WebElement. Hence you can't access the element through any index, e.g. [0], [1], etc as an index can be associated only with a list.

Solution

There are two approaches to solve the issue.

• In the first approach, you can remove the index, i.e. [0], and in that case replay will be assigned with the first matched element identified through locator strategy as follows:

  replay = driver.find_element_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")
  

• In the other approach, instead of using find_element_by_xpath() you can create a list using find_elements_by_xpath() and access the very first element from the List using the index [0] as follows:

  replay = driver.find_elements_by_xpath("""/html/body/div[2]/div/div[4]/div[3]/footer/div/div[2]/div/div[1]/div[5]/button""")[0]
  

Reference

You can find a couple of relevant discussions in:

• Exception has occurred: TypeError 'WebElement' object is not subscriptable

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