From 6f4bf2e0436c73d29037a6153bd6cea5ff2813a9 Mon Sep 17 00:00:00 2001
From: jamescalam <james.briggs@hotmail.com>
Date: Sun, 1 Dec 2024 18:30:22 +0100
Subject: [PATCH] fix: func schema string type

---
 semantic_router/schema.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/semantic_router/schema.py b/semantic_router/schema.py
index b3cee7c2..2a94b355 100644
--- a/semantic_router/schema.py
+++ b/semantic_router/schema.py
@@ -130,12 +130,12 @@ class Utterance(BaseModel):
             # we sort the dicts to ensure consistent order as we need this to compare
             # stringified function schemas accurately
             if self.function_schemas is not None:
-                function_schemas_sorted = [
+                function_schemas_sorted: List[str] | None = [
                     json.dumps(schema, sort_keys=True)
                     for schema in self.function_schemas
                 ]
             else:
-                function_schemas_sorted = []
+                function_schemas_sorted = None
             # we must do the same for metadata
             metadata_sorted = json.dumps(self.metadata, sort_keys=True)
             return f"{self.route}: {self.utterance} | {function_schemas_sorted} | {metadata_sorted}"
-- 
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