Update app.py

app.py

@@ -48,18 +48,16 @@ assistant_end = tokenizer.encode_special("<|assistant_end|>")
 
 
 def normalize_history(history):
-    """将 history 统一转换为 [(user_msg, assistant_msg), ...] 格式，并确保消息为字符串"""
     if not history:
         return []
 
-    # ------------------ 处理 messages 格式 (列表 of dicts) ------------------
     if isinstance(history[0], dict):
         pairs = []
         user_msg = None
         for msg in history:
             role = msg.get("role")
             content = msg.get("content", "")
-            # 将 content 强制转为字符串
+
             if not isinstance(content, str):
                 content = str(content) if content is not None else ""
 
@@ -71,26 +69,22 @@ def normalize_history(history):
                 if user_msg is not None:
                     pairs.append([user_msg, content])
                     user_msg = None
-                else:  # 孤立 assistant，补空 user
+                else:  
                     pairs.append(["", content])
         if user_msg is not None:
             pairs.append([user_msg, None])
         return pairs
 
-    # ------------------ 处理 tuples 格式 (列表 of list/tuple) ------------------
     normalized = []
     for turn in history:
         if isinstance(turn, (list, tuple)):
-            # 取前两个元素，多余忽略；不足补 None
             user = turn[0] if len(turn) > 0 else None
             assistant = turn[1] if len(turn) > 1 else None
 
-            # 强制转为字符串
             user = str(user) if user is not None else ""
             assistant = str(assistant) if assistant is not None else ""
             normalized.append([user, assistant])
         else:
-            # 忽略非列表/元组类型（通常不会出现）
             continue
     return normalized
 
@@ -100,7 +94,7 @@ def normalize_history(history):
 # ---------------------------------------------------------------------------
 def chat(message, history, temperature, max_tokens, top_k):
     """Generate a streaming response for the chat interface."""
-    # 在构建 tokens 之前调用
+
     history = normalize_history(history)
     # Build the full token sequence from conversation history
     # history is a list of [user_msg, assistant_msg] tuples