added _classes for knn classifiers #679
Merged
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Added _classes attribute for k-Nearest Neighbors (KNN) Algorithm
Description:
This pull request addresses the issue #669 and implements the addition of the _classes attribute for the k-Nearest Neighbors algorithm.
Changes Made:
Modified the KNNFit class to include the _classes attribute, providing unique classes based on the fitted model.
Updated the KNeighborsAlgorithm and KNeighborsRegressorAlgorithm classes to inherit from KNNFit and ClassifierMixin and RegressorMixin, respectively.
Adjusted relevant unit tests to ensure the proper functioning of the _classes attribute.
Testing:
checklist: