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[MRG + 1] Fix wrong error message in StratifiedKFold #9396

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Merged
merged 2 commits into from
Jul 18, 2017
Merged

[MRG + 1] Fix wrong error message in StratifiedKFold #9396

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d54ec4b
Fix wrong error message in StratifiedKFold
Jul 18, 2017
f6bd5f6
Remove groups in warning message
Jul 18, 2017
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6 changes: 3 additions & 3 deletions sklearn/model_selection/_split.py
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Original file line number Diff line number Diff line change
Expand Up @@ -577,13 +577,13 @@ def _make_test_folds(self, X, y=None):
y_counts = np.bincount(y_inversed)
min_groups = np.min(y_counts)
if np.all(self.n_splits > y_counts):
raise ValueError("All the n_groups for individual classes"
" are less than n_splits=%d."
raise ValueError("n_splits=%d cannot be greater than the"
" number of members in each class."
% (self.n_splits))
if self.n_splits > min_groups:
warnings.warn(("The least populated class in y has only %d"
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please fix the word groups below too

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okay

" members, which is too few. The minimum"
" number of groups for any class cannot"
" number of members in any class cannot"
" be less than n_splits=%d."
% (min_groups, self.n_splits)), Warning)

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