Traceback (most recent call last):


 "<stdin>", line 1, in <module>
TypeError: can't change class of type '<class 'A'>'

Traceback (most recent call last):


 "__main__.py", line 19, in <module>


 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmphopugs4t\build\youtube_dl\__init__.py", line 474, in main


 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmphopugs4t\build\youtube_dl\__init__.py", line 464, in _real_main


 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmphopugs4t\build\youtube_dl\YoutubeDL.py", line 2010, in download


 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmphopugs4t\build\youtube_dl\YoutubeDL.py", line 807, in extract_info


 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmphopugs4t\build\youtube_dl\YoutubeDL.py", line 868, in process_ie_result


 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmphopugs4t\build\youtube_dl\YoutubeDL.py", line 796, in extract_info


 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmphopugs4t\build\youtube_dl\extractor\common.py", line 530, in extract


 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmphopugs4t\build\youtube_dl\extractor\nexx.py", line 367, in _real_extract
TypeError: list indices must be integers, not str
