relocate scikit learn import

Author: DanielYang59

pymatviz/relevance.py

@@ -5,7 +5,6 @@
 from typing import TYPE_CHECKING
 
 import matplotlib.pyplot as plt
-import sklearn.metrics as skm
 
 from pymatviz.utils import df_to_arrays
 
@@ -37,6 +36,8 @@ def roc_curve(
     ax = ax or plt.gca()
 
     # get the metrics
+    import sklearn.metrics as skm
+
     false_pos_rate, true_pos_rate, _ = skm.roc_curve(targets, proba_pos)
     roc_auc = skm.roc_auc_score(targets, proba_pos)
 
@@ -71,6 +72,8 @@ def precision_recall_curve(
     ax = ax or plt.gca()
 
     # get the metrics
+    import sklearn.metrics as skm
+
     precision, recall, _ = skm.precision_recall_curve(targets, proba_pos)
 
     # proba_pos.round() converts class probabilities to integer class labels