diff --git a/src/qonnx/transformation/general.py b/src/qonnx/transformation/general.py
index 4ac87036..fa4acdbf 100644
--- a/src/qonnx/transformation/general.py
+++ b/src/qonnx/transformation/general.py
@@ -342,11 +342,11 @@ def apply(self, model):
             # set specified defaults
             default_values = []
             for key, value in model_config["Defaults"].items():
-                assert (len(value) % 2 == 0)
+                assert len(value) % 2 == 0
                 if key not in model_config:
                     for val, op in zip(value[::2], value[1::2]):
-                        default_values.append((key, val, op)) 
-                        assert (not (op == "all"  and len(value) > 2))
+                        default_values.append((key, val, op))
+                        assert not (op == "all" and len(value) > 2)
             default_configs = {key: val for key, val, op in default_values if op == "all" or node.op_type in op}
             for attr, value in default_configs.items():
                 inst.set_nodeattr(attr, value)