diff --git a/mlc_llm/core.py b/mlc_llm/core.py
index 17352ec811..52a1041a1d 100644
--- a/mlc_llm/core.py
+++ b/mlc_llm/core.py
@@ -380,9 +380,9 @@ def _parse_args(parsed) -> argparse.Namespace:
         parsed.quantization.name,
     ]
     if parsed.use_presharded_weights:
-        model_name.append(f'presharded-{parsed.num_shards}gpu')
+        model_name.append(f"presharded-{parsed.num_shards}gpu")
 
-    parsed.artifact_path = os.path.join(parsed.artifact_path, '-'.join(model_name))
+    parsed.artifact_path = os.path.join(parsed.artifact_path, "-".join(model_name))
 
     return parsed
 
@@ -828,7 +828,6 @@ def build_model_from_args(args: argparse.Namespace):
             sharding_module = create_shard_info_func(param_manager, args, model_config)
             mod.update(sharding_module)
 
-
         with open(cache_path, "wb") as outfile:
             pickle.dump(mod, outfile)
         print(f"Save a cached module to {cache_path}.")
diff --git a/mlc_llm/utils.py b/mlc_llm/utils.py
index be93628a41..b995de2956 100644
--- a/mlc_llm/utils.py
+++ b/mlc_llm/utils.py
@@ -280,11 +280,9 @@ def save_params(params: List[tvm.nd.NDArray], artifact_path: str, num_presharded
     assert len(params) % num_presharded == 0
     num_weights = len(params) // num_presharded
 
-
     meta_data = {}
     param_dict = {}
     meta_data["ParamSize"] = len(params)
-    total_size = 0.0
     for i, nd in enumerate(params):
         if num_presharded == 1:
             param_name = f"param_{i}"