fix python style (intel-analytics#9742)

* fix python style

* fix

* fix

python/llm/src/bigdl/llm/transformers/gguf/models/mixtral.py

@@ -17,7 +17,7 @@
 import os
 import torch
 from accelerate import init_empty_weights
-from accelerate.utils import set_module_tensor_to_device
+from accelerate.utils import set_module_tensor_to_device as fill_model
 from tempfile import NamedTemporaryFile
 from transformers import MixtralConfig, MixtralForCausalLM, LlamaTokenizer
 
@@ -57,12 +57,18 @@ def process_mixtral(name, tensor):
         module_name = get_mixtral_module_name(name)
         if 'ffn_gate_inp' in name:
             # gguf weight needs to reshape for ffn_gate_inp
-            set_module_tensor_to_device(model, module_name, "cpu", \
-                tensor.reshape(num_local_experts, hidden_size), dtype=dtype)
+            fill_model(model,
+                       module_name,
+                       "cpu",
+                       tensor.reshape(num_local_experts, hidden_size),
+                       dtype=dtype)
         else:
-            set_module_tensor_to_device(model, module_name, "cpu", \
-                tensor, dtype=dtype)
-
+            fill_model(model,
+                       module_name,
+                       "cpu",
+                       tensor,
+                       dtype=dtype)
+
     tensor_loader = loader.tensor_loader
     tensor_loader.load_while_process(process_mixtral)
 
@@ -83,6 +89,7 @@ def process_mixtral(name, tensor):
 
     return model, tokenizer
 
+
 def get_mixtral_module_name(name):
         if name == 'token_embd.weight':
             return 'model.embed_tokens.weight'
@@ -92,7 +99,7 @@ def get_mixtral_module_name(name):
             return 'lm_head.weight'
         layer_id = name.split('.')[1]
         if 'attn_q' in name:
-            return  f'model.layers.{layer_id}.self_attn.q_proj.weight'
+            return f'model.layers.{layer_id}.self_attn.q_proj.weight'
         if 'attn_k' in name:
             return f'model.layers.{layer_id}.self_attn.k_proj.weight'
         if 'attn_v' in name:
@@ -115,4 +122,3 @@ def get_mixtral_module_name(name):
         if 'ffn_up' in name:
             return f'model.layers.{layer_id}.' + \
                    f'block_sparse_moe.experts.{local_expert_id}.w3.weight'
-