[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

machine_learning/adaboost.py

@@ -76,7 +76,9 @@ def _build_stump(
             thresholds = np.unique(feature_matrix[:, feature])
             for threshold in thresholds:
                 for polarity in [1, -1]:
-                    pred = self._stump_predict(feature_matrix, feature, threshold, polarity)
+                    pred = self._stump_predict(
+                        feature_matrix, feature, threshold, polarity
+                    )
                     error = np.sum(sample_weights * (pred != target_signed))
                     if error < min_error:
                         min_error = error
@@ -98,4 +100,4 @@ def _stump_predict(
             pred[feature_matrix[:, feature] < threshold] = -1
         else:
             pred[feature_matrix[:, feature] > threshold] = -1
-        return pred
+        return pred