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[python] add type hints on sklearn metric and eval wrappers #5238

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May 25, 2022
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[python] add type hints on sklearn metric and eval wrappers #5238

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4 changes: 2 additions & 2 deletions python-package/lightgbm/sklearn.py
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Original file line number Diff line number Diff line change
Expand Up @@ -83,7 +83,7 @@ def __init__(self, func: _LGBM_ScikitCustomObjectiveFunction):
"""
self.func = func

def __call__(self, preds, dataset):
def __call__(self, preds: np.ndarray, dataset: Dataset) -> Tuple[np.ndarray, np.ndarray]:
"""Call passed function with appropriate arguments.

Parameters
Expand Down Expand Up @@ -165,7 +165,7 @@ def __init__(self, func: _LGBM_ScikitCustomEvalFunction):
"""
self.func = func

def __call__(self, preds, dataset):
def __call__(self, preds: np.ndarray, dataset: Dataset) -> Tuple[str, float, bool]:
"""Call passed function with appropriate arguments.

Parameters
Expand Down