bug report

[weir12]

Hi:
The following error report occurs when I use AutoSklearn2Classifier:

~/envs/nn/lib/python3.7/site-packages/autosklearn/experimental/askl2.py in fit(self, X, y, X_test, y_test, metric, feat_type, dataset_name)
    331             dataset_name=None):
    332 
--> 333         with open(selector_file, 'rb') as fh:
    334             selector = pickle.load(fh)
    335 

IsADirectoryError: [Errno 21] Is a directory: '/home/weir12/.cache'

I guess there is a problem with the following code, after my review.

auto-sklearn/autosklearn/experimental/askl2.py

Lines 30 to 36 in 18d2665

	selector_file = pathlib.Path(
	os.environ.get(
	'XDG_CACHE_HOME',
	'~/.cache/auto-sklearn/askl2_selector_%s_%s_%s.pkl'
	% (autosklearn_version, sklearn_version, training_data_hash),
	)
	).expanduser()

It should be replaced by

selector_file = pathlib.Path(
    os.environ.get(
        'XDG_CACHE_HOME'),
        '~/.cache/auto-sklearn/askl2_selector_%s_%s_%s.pkl'
        % (autosklearn_version, sklearn_version, training_data_hash),
    ).expanduser()

Otherwise, the file path of selector does not seem to be generated correctly.
Thanks!

[mfeurer]

Thank you very much for reporting this. @franchuterivera will have a look at this. However, it might rather be:

selector_file = pathlib.Path(os.environ.get('XDG_CACHE_HOME', pathlib.Path('~') / '.cache')
selector_file = selector_file / 'auto-sklearn' / (askl2_selector_%s_%s_%s.pkl' % (autosklearn_version, sklearn_version, training_data_hash))
selector_file = selector_file.expanduser()

[mfeurer]

Fixed via #1073. Will be available in the next release.