Pytube报错AttributeError: 'NoneType'对象无span属性求助

昨日程序运行正常，今日执行时出现错误。此前仅为适配新YouTube链接手动更新了pytube的cipher.py文件。

程序代码 #

from pytube import YouTube

url = input("Give link: ")
video = YouTube(url)

video_audio = video.streams.get_audio_only()

video_audio.download(filename_prefix="Audio ")

报错信息 #

Traceback (most recent call last):
  File "C:\Users\Admin\Desktop\Python\YTDowlander.py", line 8, in <module>
    video_audio = video.streams.get_audio_only()
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python311\Lib\site-packages\pytube\__main__.py", line 296, in streams
    return StreamQuery(self.fmt_streams)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python311\Lib\site-packages\pytube\__main__.py", line 181, in fmt_streams
    extract.apply_signature(stream_manifest, self.vid_info, self.js)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python311\Lib\site-packages\pytube\extract.py", line 414, in apply_signature
    cipher = Cipher(js=js)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python311\Lib\site-packages\pytube\cipher.py", line 44, in __init__
    self.throttling_plan = get_throttling_plan(js)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python311\Lib\site-packages\pytube\cipher.py", line 412, in get_throttling_plan
    transform_plan_raw = find_object_from_startpoint(raw_code, match.span()[1] - 1)
AttributeError: 'NoneType' object has no attribute 'span'

解决方案 #

• 优先安装pytube最新开发版，官方会实时跟进YouTube的JS结构变化，无需手动修改文件：

  pip install git+https://github.com/pytube/pytube.git
  

• 若坚持使用旧版本，检查cipher.py中get_throttling_plan函数的正则表达式，确认其能匹配当前YouTube页面的JS代码——报错原因是正则匹配失败，match变量为None，无法调用span()方法。
• 直接替换cipher.py中get_throttling_plan函数为官方仓库的最新实现，确保逻辑与YouTube当前的JS结构兼容。

内容的提问来源于stack exchange，提问作者Artur