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Include informative error message when checking classification target is of a non-regression type #26281

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Merged
merged 3 commits into from
Apr 28, 2023
Merged

Include informative error message when checking classification target is of a non-regression type #26281

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3b4c8a2
Include informative error message
jpangas Apr 25, 2023
9a82a45
Update sklearn/utils/multiclass.py
jpangas Apr 27, 2023
8bf4c48
Update sklearn/utils/multiclass.py
jpangas Apr 27, 2023
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6 changes: 5 additions & 1 deletion sklearn/utils/multiclass.py
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Original file line number Diff line number Diff line change
Expand Up @@ -215,7 +215,11 @@ def check_classification_targets(y):
"multilabel-indicator",
"multilabel-sequences",
]:
raise ValueError("Unknown label type: %r" % y_type)
raise ValueError(
f"Unknown label type: {y_type}. Maybe you are trying to fit a "
"classifier, which expects discrete classes on a "
"regression target with continuous values."
)


def type_of_target(y, input_name=""):
Expand Down