diff --git a/scatrex/scatrex.py b/scatrex/scatrex.py
index 4b7970c..3aa88cd 100644
--- a/scatrex/scatrex.py
+++ b/scatrex/scatrex.py
@@ -1551,16 +1551,28 @@ def plot_cnv_inheritance(self):
 
     def plot_proportions(self, dna=True, rna=True, show=True):
         if dna:
-            dna_props = np.array([self.observed_tree.tree_dict[node]['weight'] for node in self.observed_tree.tree_dict])
+            dna_props = np.array(
+                [
+                    self.observed_tree.tree_dict[node]["weight"]
+                    for node in self.observed_tree.tree_dict
+                ]
+            )
             nodes_labels = np.array([node for node in self.observed_tree.tree_dict])
-            colors = np.array([self.observed_tree.tree_dict[node]['color'] for node in self.observed_tree.tree_dict])
+            colors = np.array(
+                [
+                    self.observed_tree.tree_dict[node]["color"]
+                    for node in self.observed_tree.tree_dict
+                ]
+            )
             s = np.argsort(np.array(nodes_labels))
             dna_nodes_labels = nodes_labels[s]
             dna_colors = colors[s]
             dna_props = dna_props[s]
 
         if rna:
-            rna_nodes, rna_props = self.ntssb.get_node_data_sizes(normalized=True, super_only=True)
+            rna_nodes, rna_props = self.ntssb.get_node_data_sizes(
+                normalized=True, super_only=True
+            )
             nodes_labels = [node.label for node in nodes]
             s = np.argsort(np.array(nodes_labels))
             rna_nodes = np.array(rna_nodes)[s]
@@ -1570,12 +1582,19 @@ def plot_proportions(self, dna=True, rna=True, show=True):
 
         if dna and rna:
             if set(dna_nodes_labels) != set(rna_nodes_labels):
-                raise ValueError(f"DNA and RNA nodes are not the same! DNA: {dna_nodes_labels}, RNA: {rna_nodes_labels}")
+                raise ValueError(
+                    f"DNA and RNA nodes are not the same! DNA: {dna_nodes_labels}, RNA: {rna_nodes_labels}"
+                )
             handles = []
             for i, node in enumerate(rna_nodes):
                 dna_bottom = np.sum(dna_props[:i])
                 rna_bottom = np.sum(rna_props[:i])
-                h = plt.bar(['DNA', 'RNA'], [dna_props[i], rna_props[i]], color=[dna_colors[i], rna_colors[i]], bottom=[dna_bottom, rna_bottom])
+                h = plt.bar(
+                    ["DNA", "RNA"],
+                    [dna_props[i], rna_props[i]],
+                    color=[dna_colors[i], rna_colors[i]],
+                    bottom=[dna_bottom, rna_bottom],
+                )
                 handles.append(h[0])
                 plt.legend(handles, nodes_labels)
         else: