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ENH: add primitive type hints to LogTransformer #3367

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ENH: add primitive type hints to LogTransformer #3367

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7467a61
ENH: add primitive type hints to LogTransformer - relates to #1454
Nandinisingh07 Mar 27, 2026
deee7b1
Automatic `pre-commit` fixes
Nandinisingh07 Mar 27, 2026
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7 changes: 4 additions & 3 deletions aeon/transformations/series/_log.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
__all__ = ["LogTransformer"]

import numpy as np
from numpy import ndarray

from aeon.transformations.series.base import (
BaseSeriesTransformer,
Expand Down Expand Up @@ -46,12 +47,12 @@ class LogTransformer(SeriesInverseTransformerMixin, BaseSeriesTransformer):
"capability:multivariate": True,
}

def __init__(self, offset=0, scale=1):
def __init__(self, offset: float = 0, scale: float = 1) -> None:
self.offset = offset
self.scale = scale
super().__init__(axis=1)

def _transform(self, X, y=None):
def _transform(self, X: ndarray, y: None = None) -> ndarray:
"""Transform X and return a transformed version.

private _transform containing the core logic, called from transform
Expand All @@ -73,7 +74,7 @@ def _transform(self, X, y=None):
Xt = np.log(scale * (X + offset))
return Xt

def _inverse_transform(self, X, y=None):
def _inverse_transform(self, X: ndarray, y: None = None) -> ndarray:
"""Inverse transform X and return an inverse transformed version.

core logic
Expand Down
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