Traceback (most recent call last):


 "/home/ubuntu/python_project/sklearn_examples/test_tmp.py", line 6, in <module>

import autosklearn.regression


 "/usr/local/lib/python3.5/dist-packages/autosklearn/regression.py", line 1, in <module>

from autosklearn.estimators import AutoSklearnRegressor


 "/usr/local/lib/python3.5/dist-packages/autosklearn/estimators.py", line 4, in <module>

from autosklearn.automl import AutoMLClassifier, AutoMLRegressor


 "/usr/local/lib/python3.5/dist-packages/autosklearn/automl.py", line 31, in <module>

from autosklearn.smbo import AutoMLSMBO


 "/usr/local/lib/python3.5/dist-packages/autosklearn/smbo.py", line 10, in <module>

from smac.facade.smac_facade import SMAC


 "/usr/local/lib/python3.5/dist-packages/smac-0.8.0-py3.5.egg/smac/facade/smac_facade.py", line 24, in <module>


 "/usr/local/lib/python3.5/dist-packages/smac-0.8.0-py3.5.egg/smac/optimizer/smbo.py", line 11, in <module>


 "/usr/local/lib/python3.5/dist-packages/smac-0.8.0-py3.5.egg/smac/epm/rf_with_instances.py", line 4, in <module>
ImportError: cannot import name 'regression'

Traceback (most recent call last):


 "/usr/local/bin/spotdl", line 5, in <module>

from spotdl.spotdl import main


 "/usr/local/lib/python3.7/site-packages/spotdl/spotdl.py", line 14, in <module>

from spotdl import youtube_tools


 "/usr/local/lib/python3.7/site-packages/spotdl/youtube_tools.py", line 3, in <module>

import pafy


 "/usr/local/lib/python3.7/site-packages/pafy/__init__.py", line 7, in <module>

from .pafy import new


 "/usr/local/lib/python3.7/site-packages/pafy/pafy.py", line 52, in <module>

"pafy: youtube-dl not found; you can use the internal backend by "
ImportError: pafy: youtube-dl not found; you can use the internal backend by setting the environmental variable PAFY_BACKEND to "internal". It is not enabled by default because it is not as well maintained as the youtube-dl backend.
