选择课程下载就报错啦，是AES key长度的问题

[du21977]

Traceback (most recent call last):
File "C:/51cto-video-download-master/run.py", line 34, in
fun(ss)
File "C:\51cto-video-download-master\Course.py", line 7, in run
lesson.Lesson(ss).set_course_id_by_course_list().lesson_list().download()
File "C:\51cto-video-download-master\cto\lesson.py", line 168, in download
tools.download(file_name, urls, func_decode)
File "C:\51cto-video-download-master\cto\tools.py", line 42, in download
data = func_decode(data)
File "C:\51cto-video-download-master\cto\lesson.py", line 166, in func_decode
return decory_video.Video().decory(play_key, str(lesson_id), video_data)
File "C:\51cto-video-download-master\cto\decory_video.py", line 18, in decory
cipher = AES.new(key, AES.MODE_ECB, iv)
File "C:\51cto-video-download-master\venv\lib\site-packages\Crypto\Cipher\AES.py", line 95, in new
return AESCipher(key, *args, **kwargs)
File "C:\51cto-video-download-master\venv\lib\site-packages\Crypto\Cipher\AES.py", line 59, in init
blockalgo.BlockAlgo.init(self, _AES, key, *args, **kwargs)
File "C:\51cto-video-download-master\venv\lib\site-packages\Crypto\Cipher\blockalgo.py", line 141, in init
self._cipher = factory.new(key, *args, **kwargs)
ValueError: AES key must be either 16, 24, or 32 bytes long