fix(llm_caching_handler.py): handle no current event loop error

litellm/caching/llm_caching_handler.py

@@ -14,9 +14,12 @@ class LLMClientCache(InMemoryCache):
         Add the event loop to the cache key, to prevent event loop closed errors.
         If none, use the key as is.
         """
+        try:
             event_loop = asyncio.get_event_loop()
             stringified_event_loop = str(id(event_loop))
             return f"{key}-{stringified_event_loop}"
+        except Exception:  # handle no current event loop
+            return key
 
     def set_cache(self, key, value, **kwargs):
         key = self.update_cache_key_with_event_loop(key)