community: deprecate community ollama integrations (#26733)

libs/community/langchain_community/chat_models/ollama.py

@@ -47,6 +47,11 @@ def _chat_stream_response_to_chat_generation_chunk(
     )
 
 
+@deprecated(
+    since="0.3.1",
+    removal="1.0.0",
+    alternative_import="langchain_ollama.ChatOllama",
+)
 class ChatOllama(BaseChatModel, _OllamaCommon):
     """Ollama locally runs large language models.
 

libs/community/langchain_community/embeddings/ollama.py

@@ -2,12 +2,18 @@ import logging
 from typing import Any, Dict, List, Mapping, Optional
 
 import requests
+from langchain_core._api.deprecation import deprecated
 from langchain_core.embeddings import Embeddings
 from pydantic import BaseModel, ConfigDict
 
 logger = logging.getLogger(__name__)
 
 
+@deprecated(
+    since="0.3.1",
+    removal="1.0.0",
+    alternative_import="langchain_ollama.OllamaEmbeddings",
+)
 class OllamaEmbeddings(BaseModel, Embeddings):
     """Ollama locally runs large language models.
 

libs/community/langchain_community/llms/ollama.py

@@ -16,6 +16,7 @@ from typing import (
 
 import aiohttp
 import requests
+from langchain_core._api.deprecation import deprecated
 from langchain_core.callbacks import (
     AsyncCallbackManagerForLLMRun,
     CallbackManagerForLLMRun,
@@ -389,6 +390,11 @@ class _OllamaCommon(BaseLanguageModel):
         return final_chunk
 
 
+@deprecated(
+    since="0.3.1",
+    removal="1.0.0",
+    alternative_import="langchain_ollama.OllamaLLM",
+)
 class Ollama(BaseLLM, _OllamaCommon):
     """Ollama locally runs large language models.
     To use, follow the instructions at https://ollama.ai/.