pytube.exceptions.RegexMatchError: get_throttling_function_name:无法找到多个匹配的

Question

我过去常以下列方式下载歌曲：

from pytube import YouTube
video = YouTube('https://www.youtube.com/watch?v=AWXvSBHB210')
video.streams.get_by_itag(251).download()

从今天起，出现了以下错误：

Traceback (most recent call last):
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\__main__.py", line 170, in fmt_streams
    extract.apply_signature(stream_manifest, self.vid_info, self.js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\extract.py", line 409, in apply_signature
    cipher = Cipher(js=js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 43, in __init__
    self.throttling_plan = get_throttling_plan(js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 387, in get_throttling_plan
    raw_code = get_throttling_function_code(js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 293, in get_throttling_function_code
    name = re.escape(get_throttling_function_name(js))
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 278, in get_throttling_function_name
    raise RegexMatchError(
pytube.exceptions.RegexMatchError: get_throttling_function_name: could not find match for multiple

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Me\Documents\YouTubeDownloader.py", line 3, in <module>
    video.streams.get_by_itag(251).download()
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\__main__.py", line 285, in streams
    return StreamQuery(self.fmt_streams)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\__main__.py", line 177, in fmt_streams
    extract.apply_signature(stream_manifest, self.vid_info, self.js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\extract.py", line 409, in apply_signature
    cipher = Cipher(js=js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 43, in __init__
    self.throttling_plan = get_throttling_plan(js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 387, in get_throttling_plan
    raw_code = get_throttling_function_code(js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 293, in get_throttling_function_code
    name = re.escape(get_throttling_function_name(js))
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 278, in get_throttling_function_name
    raise RegexMatchError(
pytube.exceptions.RegexMatchError: get_throttling_function_name: could not find match for multiple

Answer 1

当我使用pytube 11.0.0时，我也遇到了同样的问题。

结果发现，在cipher.py类的pytube库中存在正则表达式过滤器失配。

function_patterns = [

    r'a\.C&&\(b=a\.get\("n"\)\)&&\(b=([^(]+)\(b\),a\.set\("n",b\)\)}};',
]

现在，昨天管道代码更新为11.0.1。

function_patterns = [

    r'a\.[A-Z]&&\(b=a\.get\("n"\)\)&&\(b=([^(]+)\(b\)',
]

与此代码更新，现在下载youtube视频与管道工程！

使用以下命令更新您的pytube库：

python3 -m pip install --upgrade pytube

Answer 2

因为youtube在其末端改变了一些东西，现在您必须将pytube的cifer.py的get_throttling_function_name变量function_patterns更改为以下内容

r'a\.[a-zA-Z]\s*&&\s*\([a-z]\s*=\s*a\.get\("n"\)\)\s*&&\s*'
r'\([a-z]\s*=\s*([a-zA-Z0-9$]{2,3})(\[\d+\])?\([a-z]\)'

你还必须把第288行改为：

nfunc=re.escape(function_match.group(1))),

您将不得不使用此解决方案，直到pytube正式发布修补程序。

Answer 3

更新的regex表达式：

r'a\.[a-zA-Z]\s*&&\s*\([a-z]\s*=\s*a\.get\("n"\)\)\s*&&\s*'

r'\([a-z]\s*=\s*([a-zA-Z0-9$]{2,3})(\[\d+\])?\([a-z]\)'

在上面的答案中，如果只是从网络上复制/粘贴，就可能会被吡咯烷酮错误地解析。若要修复，请尝试将两个字符串合并到一行中：

r'a\.[a-zA-Z]\s*&&\s*\([a-z]\s*=\s*a\.get\("n"\)\)\s*&&\s*\([a-z]\s*=\s*([a-zA-Z0-9$]{2,3})(\[\d+\])?\([a-z]\)'

我发现这解决了V12.0.0的问题