chore(KernelPCA): scikit-learn/scikit-learn#19908

automl · Nov 15, 2022 · f9e517a · f9e517a
1 parent bf477f1
commit f9e517a
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/autosklearn/pipeline/components/feature_preprocessing/kernel_pca.py b/autosklearn/pipeline/components/feature_preprocessing/kernel_pca.py
@@ -50,10 +50,10 @@ def fit(self, X, Y=None):
         with warnings.catch_warnings():
             warnings.filterwarnings("error")
             self.preprocessor.fit(X)
-        # Raise an informative error message, equation is based ~line 249 in
-        # kernel_pca.py in scikit-learn
-        if len(self.preprocessor.alphas_ / self.preprocessor.lambdas_) == 0:
+
+        if self.preprocessor._n_features_out == 0:
             raise ValueError("KernelPCA removed all features!")
+
         return self
 
     def transform(self, X):