Pytube只定期工作(KeyError：“资产”)

Question

在尝试运行我的小测试脚本时，每十次中有五次Pytube会向我发送此错误。

下面是剧本：

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!')

我得到的是：

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'

我很困惑。我试图重新安装Python pytube，但是我似乎无法解决这个问题。越来越令人费解的是，剧本一半的时间都在工作，而另一半时间却没有。

Answer 1

就目前而言，100%地修正了这一点：

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

如果其他人收到此错误或问题，请在终端或cmd：python -m pip install git+https://github.com/nficano/pytube中运行以下命令

对pytubeX的更新还没有随pip安装一起发布。GitHub链接是解释这种情况的当前开发工具。

Answer 2

我也遇到了同样的麻烦，但我保证最上面的答案不会解决任何问题，只要把问题隐藏起来，直到它再次弹出。我研究了"extract.py“文件的这个范围，发现了一个错误。此范围通过字典搜索在Youtube页面的源代码中搜索“字符串”片段，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'

这是因为源代码的这个片段不支持dicionario搜索，所以“KeyError”键错误，因为“资产”不是有效的键，而且源代码不是字典。所以我做了这个剧本，我相信它取代了原来的剧本，但在我的剧本里，特别是出现了其他的错误。

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作出了贡献:)

Answer 3

将此函数添加到extract.py中

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“extract.py”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

至：

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