[FIX] Fix calls to matplotlib.cm.get_cmap (#1185)

clinica/pipelines/machine_learning/ml_utils.py

@@ -102,9 +102,9 @@ def metric_distribution(
     """
     # from __future__ import print_function, division
 
+    import matplotlib as mpl
     import matplotlib.pyplot as plt
     import numpy as np
-    from matplotlib import cm
     from matplotlib.backends.backend_pdf import PdfPages
 
     num_repetitions = metric.shape[0]
@@ -122,7 +122,7 @@ def metric_distribution(
         positions=method_ticks,
     )
 
-    cmap = cm.get_cmap("Paired", num_datasets)
+    cmap = mpl.colormaps["Paired"].resampled(num_datasets)
     for cc, ln in enumerate(line_coll["bodies"]):
         ln.set_facecolor(cmap(cc))
         ln.set_label(labels[cc])