Refactor isco_hierarchy assignment in MetricTemplate1

metric_template_1.py

@@ -97,7 +97,7 @@ class MetricTemplate1(evaluate.Metric):
         isco_json = dl_manager.download_and_extract(ISCO_JSON_URL)
         print(f"ISCO CSV file downloaded")
         # self.isco_hierarchy = isco.create_hierarchy_dict(isco_csv)
-        self.isco_hierarchy: dict = json.load(isco_json)
+        self.isco_hierarchy = isco.create_hierarchy_tree(isco_json)
         print("ISCO hierarchy dictionary created")
         print(self.isco_hierarchy)