Traceback (most recent call last):


 "./basic_example.py", line 7, in <module>

trainer='chatterbot.trainers.ListTrainer'


 "/Library/Python/2.7/site-packages/ChatterBot/chatterbot/chatterbot.py", line 39, in __init__

self.storage = utils.initialize_class(storage_adapter, **kwargs)


 "/Library/Python/2.7/site-packages/ChatterBot/chatterbot/utils.py", line 33, in initialize_class

return Class(**kwargs)


 "/Library/Python/2.7/site-packages/ChatterBot/chatterbot/storage/sql_storage.py", line 41, in __init__

from sqlalchemy import create_engine
ImportError: No module named sqlalchemy

ERROR: Signature extraction failed: Traceback (most recent call last):

 "bin/youtube-dl/youtube-dl/youtube_dl/extractor/youtube.py", line 601, in _decrypt_signature
video_id, player_url, s

 "bin/youtube-dl/youtube-dl/youtube_dl/extractor/youtube.py", line 497, in _extract_signature_function
raise ExtractorError('Cannot identify player %r' % player_url)ExtractorError: Cannot identify player u'https://s.ytimg.com/yts/jsbin/player-en_US-vflYjf147/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type
youtube-dl -U
to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.