refactor ruff

Author: sfluegel05

chebi_utils/obo_extractor.py

@@ -143,9 +143,11 @@ def build_chebi_graph(filepath: str | Path, top_class: str | None = "23367") ->
 def get_hierarchy_subgraph(chebi_graph: nx.DiGraph) -> nx.DiGraph:
     """Subgraph of ChEBI including only edges corresponding to hierarchical relations (is_a).
     Also removes nodes that are not connected by any is_a edges to other nodes."""
-    return nx.DiGraph(chebi_graph.edge_subgraph(
-        (u, v) for u, v, d in chebi_graph.edges(data=True) if d.get("relation") == "is_a"
-    ))
+    return nx.DiGraph(
+        chebi_graph.edge_subgraph(
+            (u, v) for u, v, d in chebi_graph.edges(data=True) if d.get("relation") == "is_a"
+        )
+    )
 
 
 if __name__ == "__main__":