Harrison/azure openai (#3942)

Co-authored-by: Saverio Proto <zioproto@gmail.com>

langchain/embeddings/openai.py

@@ -94,7 +94,9 @@ class OpenAIEmbeddings(BaseModel, Embeddings):
             from langchain.embeddings.openai import OpenAIEmbeddings
             embeddings = OpenAIEmbeddings(
                 deployment="your-embeddings-deployment-name",
-                model="your-embeddings-model-name"
+                model="your-embeddings-model-name",
+                api_base="https://your-endpoint.openai.azure.com/",
+                api_type="azure",
             )
             text = "This is a test query."
             query_result = embeddings.embed_query(text)
@@ -104,6 +106,11 @@ class OpenAIEmbeddings(BaseModel, Embeddings):
     client: Any  #: :meta private:
     model: str = "text-embedding-ada-002"
     deployment: str = model  # to support Azure OpenAI Service custom deployment names
+    openai_api_version: str = "2022-12-01"
+    # to support Azure OpenAI Service custom endpoints
+    openai_api_base: Optional[str] = None
+    # to support Azure OpenAI Service custom endpoints
+    openai_api_type: Optional[str] = None
     embedding_ctx_length: int = 8191
     openai_api_key: Optional[str] = None
     openai_organization: Optional[str] = None
@@ -125,6 +132,23 @@ class OpenAIEmbeddings(BaseModel, Embeddings):
         openai_api_key = get_from_dict_or_env(
             values, "openai_api_key", "OPENAI_API_KEY"
         )
+        openai_api_base = get_from_dict_or_env(
+            values,
+            "openai_api_base",
+            "OPENAI_API_BASE",
+            default="",
+        )
+        openai_api_type = get_from_dict_or_env(
+            values,
+            "openai_api_type",
+            "OPENAI_API_TYPE",
+            default="",
+        )
+        openai_api_version = get_from_dict_or_env(
+            values,
+            "openai_api_version",
+            "OPENAI_API_VERSION",
+        )
         openai_organization = get_from_dict_or_env(
             values,
             "openai_organization",
@@ -137,6 +161,11 @@ class OpenAIEmbeddings(BaseModel, Embeddings):
             openai.api_key = openai_api_key
             if openai_organization:
                 openai.organization = openai_organization
+            if openai_api_base:
+                openai.api_base = openai_api_base
+                openai.api_version = openai_api_version
+            if openai_api_type:
+                openai.api_type = openai_api_type
             values["client"] = openai.Embedding
         except ImportError:
             raise ValueError(