[MRG] Fix plot_out_of_core_classification.py. #9815
Starting from an empty ~/scikit_learn_data I got
I have to say I am not sure why this is happening and why we did not spot it earlier on CircleCI, maybe because ~/scikit_learn_data was cached.
I'll merge this when CircleCI is green.
And just for fun, a snippet that reproduces the problem and seems to indicate something is wrong with six:
from sklearn.externals.six.moves.urllib.request import urlretrieve from sklearn.externals.six.moves import urllib urllib.request.urlretrieve
This is probably due to the fact we vendor an old copy of