diff --git a/python/cugraph/cugraph/structure/graph_implementation/simpleGraph.py b/python/cugraph/cugraph/structure/graph_implementation/simpleGraph.py
index b4e9e4fb32f..22d82eb1796 100644
--- a/python/cugraph/cugraph/structure/graph_implementation/simpleGraph.py
+++ b/python/cugraph/cugraph/structure/graph_implementation/simpleGraph.py
@@ -1286,9 +1286,13 @@ def nodes(self):
                 else:
                     return df[df.columns[0]]
             else:
-                return cudf.concat(
-                    [df[simpleGraphImpl.srcCol], df[simpleGraphImpl.dstCol]]
-                ).drop_duplicates().reset_index(drop=True)
+                return (
+                    cudf.concat(
+                        [df[simpleGraphImpl.srcCol], df[simpleGraphImpl.dstCol]]
+                    )
+                    .drop_duplicates()
+                    .reset_index(drop=True)
+                )
         if self.adjlist is not None:
             return cudf.Series(np.arange(0, self.number_of_nodes()))