Update app.py

app.py

@@ -323,6 +323,8 @@ async def add_key(request: Request):
 # 聊天完成路由
 @app.post("/api/v1/chat/completions")
 async def chat_completions(request: Request):
+    global key_cycle  # 声明使用全局变量
+    
     try:
         # 获取请求体
         body = await request.body()
@@ -330,7 +332,7 @@ async def chat_completions(request: Request):
         
         # 获取headers
         headers = {
-            "Authorization": f"Bearer {next(key_cycle)}",  # 使用 key_cycle 而不是 get_next_key
+            "Authorization": f"Bearer {next(key_cycle)}",
             "Content-Type": "application/json",
             "Accept": "text/event-stream" if body_json.get("stream") else "application/json"
         }