class PermissionException(Exception):
    def __init__(self, body):
        self.body = body

class DemoException(PermissionException):
    def __init__(self):
        Exception.__init__(self,self.body)
def register_exception(app: FastAPI):
      @user1r(DemoException)
    async def all_exception_handler(request: Request, exc: DemoException):
        # #query参数:
        # query_data = request.query_params
        # print(query_data)
        print(exc.body)
        log_msg = f"捕获到系统错误：请求路径:{request.url.path}\n错误信息：{traceback.format_exc()}"
        mylog.error(log_msg)
        return JSONResponse(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            content=jsonable_encoder({
                "responseCode": Status.FAIL.get_code(),
                "responseMsg": Status.FAIL.get_msg()
            },
        ))

用了你的方法还是不行，求解。。。