使用pytube 15.0.0获取YouTube视频标题报错，求解决方法

已将pytube更新至15.0.0版本并使用补丁，但调用YouTube对象的title属性时触发KeyError: 'videoDetails'，进而抛出PytubeError。

代码： #

from pytube import YouTube

print("input url below:")
input_url = input()
my_video = YouTube(input_url)
if input_url == "": 
    pass
else: 
    print(my_video.title)
    print(my_video.thumbnail_url)

my_video = my_video.streams.get_lowest_resolution
print(my_video)

报错信息： #

Traceback (most recent call last):
  File "C:\Users\(censored)\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\pytube\__main__.py", line 330, in title
    self._title = self.vid_info['videoDetails']['title']
                  ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
KeyError: 'videoDetails'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\Users\(censored)\Desktop\youtube video downloader\main.py", line 9, in <module>
    print(my_video.title)
          ^^^^^^^^^^^^^^
  File "C:\Users\(censored)\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\pytube\__main__.py", line 335, in title
    raise exceptions.PytubeError(
pytube.exceptions.PytubeError: Exception while accessing title of https://youtube.com/watch?v=vEQ8CXFWLZU. Please file a bug report at https://github.com/pytube/pytube

修复思路 #

• 修正代码语法错误：最后一行my_video = my_video.streams.get_lowest_resolution缺少调用括号，应改为my_video = my_video.streams.get_lowest_resolution()，否则只会输出方法对象而非流实例。
• 替换pytube源码解析逻辑：该错误源于YouTube页面结构更新，pytube原有vid_info解析逻辑失效。找到pytube/__main__.py中的title属性定义，替换为以下内容，改用player_response字段提取标题：

  @property
  def title(self):
      if self._title:
          return self._title
      self._title = self.player_response['videoDetails']['title']
      return self._title
  

• 增加异常捕获与备用方案：在代码中捕获KeyError和PytubeError，当pytube内置方法失效时，通过网页HTML解析获取标题：
  修改代码中的输出部分：

  else:
      try:
          print(my_video.title)
      except (KeyError, PytubeError):
          import requests
          from bs4 import BeautifulSoup
          resp = requests.get(input_url)
          soup = BeautifulSoup(resp.text, 'html.parser')
          og_title = soup.find("meta", property="og:title")
          if og_title:
              print(og_title["content"])
      print(my_video.thumbnail_url)
  

• 验证URL有效性：确保输入的是完整且有效的YouTube视频链接，避免输入空值、短链接或非视频页面地址。

内容的提问来源于stack exchange，提问作者Faust