Pytube 仅定期工作（KeyError: 'assets'）

Question

尝试运行我的小测试脚本时，Pytube 十分之五会向我发送此错误。

这是脚本：

import pytube
import urllib.request


from pytube import YouTube
yt = YouTube('https://www.youtube.com/watch?v=3NCyD3XoJgM')

print('Youtube video title is: ' + yt.title + '! Downloading now!')

这是我得到的：

Traceback (most recent call last):
  File "youtube.py", line 6, in <module>
    yt = YouTube('https://www.youtube.com/watch?v=3NCyD3XoJgM')
  File "C:\Users\test\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\pytube\__main__.py", line 91, in __init__
    self.prefetch()
  File "C:\Users\test\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\pytube\__main__.py", line 183, in prefetch
    self.js_url = extract.js_url(self.watch_html)
  File "C:\Users\test\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\pytube\extract.py", line 143, in js_url
    base_js = get_ytplayer_config(html)["assets"]["js"]
KeyError: 'assets'

我很困扰。我尝试重新安装 Python 和 pytube，但似乎无法解决此问题。越来越令人困惑的是，该脚本有一半时间有效，而另一半时间无效。

Answer 1

现在用这个固定 100%：

https://github.com/nficano/pytube/pull/767#issuecomment-716184994

如果其他人遇到此错误或问题，请在终端或 cmd 中运行此命令： python -m pip install git+https://github.com/nficano/pytube

尚未随 pip 安装发布的 pytubeX 更新。GitHub 链接是解释情况的当前开发人员。

Answer 2

我遇到了同样的麻烦，但我保证最重要的答案不能解决任何问题，只是隐藏问题直到它再次弹出。我调查了“extract.py”文件的这个范围，发现了一个错误。该范围在视频所在的 Youtube 页面的源代码中搜索“字符串”片段，通过字典搜索，例如：

#Example ---------------
Vars = {
    'name':'luis'
    'age':'27'
}
print(Vars['name'])

result: 'luis'

#Extract.py Code -------

def js_url(html: str) -> str:
"""Get the base JavaScript url.

Construct the base JavaScript url, which contains 
the decipher
"transforms".

:param str html:
    The html contents of the watch page.
"""
base_js = get_ytplayer_config(html)["assets"]["js"]
return "https://youtube.com" + base_js

错误：

base_js = get_ytplayer_config(html)["assets"]["js"]
KeyError: 'assets'

给出它是因为这个源代码片段不支持搜索为 dicionario，所以 'KeyError' 键错误，因为 'assets' 不是一个有效的键，并且源代码不是字典。所以我做了这个脚本，我相信它取代了这个原始脚本，但在我的中，特别是出现了其他错误。

def js_url(html: str) -> str:
"""Get the base JavaScript url.

Construct the base JavaScript url, which contains 
the decipher
"transforms".

:param str html:
    The html contents of the watch page.
"""
base_js = html[html.find('js') + 4:html.find('.js') 
+ 4]
return "https://youtube.com" + base_js

上面的脚本搜索函数想要的字符串，而不是字典。

我希望我为更完整的未来解决方案做出了贡献:)

Answer 3

将此函数添加到extract.py

def get_ytplayer_js(html: str) -> Any:
    """Get the YouTube player base JavaScript path.

    :param str html
    The html contents of the watch page.
    :rtype: str
    :returns:
    Path to YouTube's base.js file.
    """
    js_url_patterns = [
        r"\"jsUrl\":\"([^\"]*)\"",
    ]
    for pattern in js_url_patterns:
        regex = re.compile(pattern)
        function_match = regex.search(html)
        if function_match:
            logger.debug("finished regex search, matched: %s", pattern)
            yt_player_js = function_match.group(1)
            return yt_player_js

    raise RegexMatchError(
       caller="get_ytplayer_js", pattern="js_url_patterns"
    )

并将extract.py中的函数“js_url”更改为：

def js_url(html: str) -> str:
    """Get the base JavaScript url.

    Construct the base JavaScript url, which contains the decipher
    "transforms".

    :param str html:
        The html contents of the watch page.
    """
    base_js = get_ytplayer_config(html)["assets"]["js"]
    return "https://youtube.com" + base_js

到：

def js_url(html: str) -> str:
    """Get the base JavaScript url.

    Construct the base JavaScript url, which contains the decipher
    "transforms".

    :param str html:
        The html contents of the watch page.
    """
    base_js = get_ytplayer_js(html)
    return "https://youtube.com" + base_js

Answer 4

看来 Pytube 模块已更新。

它适用于 pytube 包

即尝试pip install pytube卸载 pytube 变体