make deployment_name optional in AzureOpenAIEncoder

semantic_router/encoders/__init__.py

 from semantic_router.encoders.base import BaseEncoder
 from semantic_router.encoders.bm25 import BM25Encoder
 from semantic_router.encoders.cohere import CohereEncoder
-from semantic_router.encoders.openai import OpenAIEncoder
 from semantic_router.encoders.fastembed import FastEmbedEncoder
+from semantic_router.encoders.openai import OpenAIEncoder
 from semantic_router.encoders.zure import AzureOpenAIEncoder
 
 __all__ = [

semantic_router/encoders/fastembed.py

 from typing import Any, List, Optional
+
 import numpy as np
 from pydantic import BaseModel, PrivateAttr
 

semantic_router/encoders/zure.py

@@ -43,8 +43,7 @@ class AzureOpenAIEncoder(BaseEncoder):
             self.deployment_name = os.getenv(
                 "AZURE_OPENAI_DEPLOYMENT_NAME", "text-embedding-ada-002"
             )
-            if self.deployment_name is None:
-                raise ValueError("No Azure OpenAI deployment name provided.")
+        # deployment_name may still be None, but it is optional in the API
         if self.azure_endpoint is None:
             self.azure_endpoint = os.getenv("AZURE_OPENAI_ENDPOINT")
             if self.azure_endpoint is None:
@@ -59,7 +58,6 @@ class AzureOpenAIEncoder(BaseEncoder):
                 raise ValueError("No Azure OpenAI model provided.")
         assert (
             self.api_key is not None
-            and self.deployment_name is not None
             and self.azure_endpoint is not None
             and self.api_version is not None
             and self.model is not None
@@ -67,7 +65,7 @@ class AzureOpenAIEncoder(BaseEncoder):
 
         try:
             self.client = openai.AzureOpenAI(
-                azure_deployment=str(deployment_name),
+                azure_deployment=str(deployment_name) if deployment_name else None,
                 api_key=str(api_key),
                 azure_endpoint=str(azure_endpoint),
                 api_version=str(api_version),

semantic_router/schema.py

@@ -8,7 +8,6 @@ from semantic_router.encoders import (
     CohereEncoder,
     OpenAIEncoder,
 )
-
 from semantic_router.utils.splitters import semantic_splitter
 
 

semantic_router/utils/splitters.py

 import numpy as np
+
 from semantic_router.encoders import BaseEncoder
 
 

tests/unit/test_splitters.py

-import pytest
 from unittest.mock import Mock
-from semantic_router.utils.splitters import semantic_splitter
+
+import pytest
+
 from semantic_router.schema import Conversation, Message
+from semantic_router.utils.splitters import semantic_splitter
 
 
 def test_semantic_splitter_consecutive_similarity_drop():