diff --git a/examples/pytorch/gpt/utils/gpt.py b/examples/pytorch/gpt/utils/gpt.py
index 20d90b45f..2c75d971b 100644
--- a/examples/pytorch/gpt/utils/gpt.py
+++ b/examples/pytorch/gpt/utils/gpt.py
@@ -38,7 +38,7 @@ def __init__(self, head_num, size_per_head, layer_num, vocab_size, max_seq_len,
                  has_post_decoder_layernorm: bool = True,
                  int8_mode: int = 0,
                  inter_size: int = 0):
-        assert(head_num % tensor_para_size == 0)
+        assert head_num % tensor_para_size == 0
 
         if int8_mode == 1:
             torch_infer_dtype = str_type_map[inference_data_type]
@@ -218,7 +218,7 @@ def __len__(self):
         return len(self.w)
 
     def _map(self, func):
-        assert(self.pre_embed_idx < self.post_embed_idx, "Pre decoder embedding index should be lower than post decoder embedding index.")
+        assert self.pre_embed_idx < self.post_embed_idx, "Pre decoder embedding index should be lower than post decoder embedding index."
         for i in range(len(self.w)):
             if isinstance(self.w[i], list):
                 for j in range(len(self.w[i])):