From f5e9ff5fee047f7f5802a3c90d9b76a008a5e19c Mon Sep 17 00:00:00 2001
From: Maximilian Rink <maximilian.rink@telekom.de>
Date: Tue, 13 Oct 2026 21:47:59 +0200
Subject: [PATCH] fix(cache): type namespace components explicitly

---
 litellm/caching/caching.py | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/litellm/caching/caching.py b/litellm/caching/caching.py
index 855e34a7b19..faf660dfe1f 100644
--- a/litellm/caching/caching.py
+++ b/litellm/caching/caching.py
@@ -650,15 +650,16 @@ class Cache:
         metadata_namespace: Final[str | None] = (
             metadata_namespace_value if isinstance(metadata_namespace_value, str) else None
         )
+        namespace_parts: Final[tuple[str | None, ...]] = (
+            self.namespace,
+            authenticated_namespace,
+            requested_namespace,
+            metadata_namespace,
+        )
         namespace: Final[str | None] = (
             ":".join(
                 value
-                for value in (
-                    self.namespace,
-                    authenticated_namespace,
-                    requested_namespace,
-                    metadata_namespace,
-                )
+                for value in namespace_parts
                 if isinstance(value, str) and value
             )
             if authenticated_namespace is not None