epdb/logic.py

@@ -831,7 +831,7 @@ class PackageManager(object):
             elif rule.get("reactionSmarts") is not None:
                 r.smirks = rule["reactionSmarts"]
             else:
-                raise ValueError("No SMIRKS or reactionSmarts found for rule {}".format(rule["id"]))
+                raise ValueError(f"No SMIRKS or reactionSmarts found for rule {rule['id']}")
 
             r.reactant_filter_smarts = rule.get("reactantFilterSmarts", None)
             r.product_filter_smarts = rule.get("productFilterSmarts", None)