Change langchain constructor to new version, change how python version is specified to match uv suggestion

Author: pamelafox

langchainv1_mcp_github.py

@@ -14,7 +14,7 @@
 from langchain.agents import create_agent
 from langchain_core.messages import HumanMessage
 from langchain_mcp_adapters.client import MultiServerMCPClient
-from langchain_openai import AzureChatOpenAI, ChatOpenAI
+from langchain_openai import ChatOpenAI
 from pydantic import SecretStr
 
 load_dotenv(override=True)
@@ -26,11 +26,10 @@
         azure.identity.DefaultAzureCredential(),
         "https://cognitiveservices.azure.com/.default",
     )
-    model = AzureChatOpenAI(
-        azure_endpoint=os.environ["AZURE_OPENAI_ENDPOINT"],
-        azure_deployment=os.environ["AZURE_OPENAI_CHAT_DEPLOYMENT"],
-        api_version=os.environ["AZURE_OPENAI_VERSION"],
-        azure_ad_token_provider=token_provider,
+    model = ChatOpenAI(
+        model=os.environ.get("AZURE_OPENAI_CHAT_DEPLOYMENT"),
+        base_url=os.environ["AZURE_OPENAI_ENDPOINT"] + "/openai/v1/",
+        api_key=token_provider,
     )
 elif API_HOST == "github":
     model = ChatOpenAI(

langchainv1_mcp_http.py

@@ -8,7 +8,7 @@
 from langchain.agents import create_agent
 from langchain_core.messages import HumanMessage, SystemMessage
 from langchain_mcp_adapters.client import MultiServerMCPClient
-from langchain_openai import AzureChatOpenAI, ChatOpenAI
+from langchain_openai import ChatOpenAI
 from pydantic import SecretStr
 from rich.logging import RichHandler
 
@@ -36,11 +36,10 @@
         azure.identity.DefaultAzureCredential(),
         AZURE_COGNITIVE_SERVICES_SCOPE
     )
-    base_model = AzureChatOpenAI(
-        azure_endpoint=os.environ.get("AZURE_OPENAI_ENDPOINT"),
-        azure_deployment=os.environ.get("AZURE_OPENAI_CHAT_DEPLOYMENT"),
-        api_version=os.environ.get("AZURE_OPENAI_VERSION"),
-        azure_ad_token_provider=token_provider,
+    base_model = ChatOpenAI(
+        model=os.environ.get("AZURE_OPENAI_CHAT_DEPLOYMENT"),
+        base_url=os.environ["AZURE_OPENAI_ENDPOINT"] + "/openai/v1/",
+        api_key=token_provider,
     )
 elif API_HOST == "github":
     base_model = ChatOpenAI(

pyproject.toml

@@ -3,7 +3,7 @@ name = "python-mcp-demos"
 version = "0.1.0"
 description = "Demonstration of Python FastMCP servers"
 readme = "README.md"
-requires-python = "==3.13"
+requires-python = "==3.13.*"
 dependencies = [
     "fastmcp>=2.12.5",
     "debugpy>=1.8.0",