From b2a7a8316b1aa66b7ca22acf21f9e4727de64201 Mon Sep 17 00:00:00 2001
From: Cursor Agent <cursoragent@cursor.com>
Date: Thu, 16 Jul 2026 02:05:08 +0000
Subject: [PATCH] fix(router): use PEP 585 frozenset[str] to satisfy UP006
 strict budget

Co-authored-by: Krrish Dholakia <krrish-berri-2@users.noreply.github.com>
---
 litellm/router.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/litellm/router.py b/litellm/router.py
index f408d030b8b..4e14d8b527d 100644
--- a/litellm/router.py
+++ b/litellm/router.py
@@ -26,7 +26,6 @@ from typing import (
     AsyncGenerator,
     Callable,
     Dict,
-    FrozenSet,
     Generator,
     List,
     Literal,
@@ -496,7 +495,7 @@ class Router:
         self.model_name_to_deployment_indices: Dict[str, List[int]] = {}
         # Maps (team_id, team_public_model_name) -> list of indices in model_list
         self.team_model_to_deployment_indices: Dict[Tuple[str, str], List[int]] = {}
-        self.team_public_model_names: FrozenSet[str] = frozenset()
+        self.team_public_model_names: frozenset[str] = frozenset()
 
         # Initialize cache attributes that ``_invalidate_model_group_info_cache``
         # touches *before* the first ``set_model_list`` below (which calls