Python: follow on work on OpenAI (#169)

* updated openai, fcc works, with sample

* reduced files in openai

python/samples/getting_started/chat_client/openai_chat_client.py

@@ -0,0 +1,38 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+import asyncio
+from random import randint
+from typing import Annotated
+
+from agent_framework import ai_function
+from agent_framework.openai import OpenAIChatClient
+from pydantic import Field
+
+
+@ai_function
+def get_weather(
+    location: Annotated[str, Field(description="The location to get the weather for.")],
+) -> str:
+    """Get the weather for a given location."""
+    conditions = ["sunny", "cloudy", "rainy", "stormy"]
+    return f"The weather in {location} is {conditions[randint(0, 3)]} with a high of {randint(10, 30)}°C."
+
+
+async def main():
+    client = OpenAIChatClient()
+    message = "What's the weather in Amsterdam and in Paris?"
+    stream = False
+    print(f"User: {message}")
+    if stream:
+        print("Assistant: ", end="")
+        async for chunk in client.get_streaming_response(message, tools=get_weather):
+            if str(chunk):
+                print(str(chunk), end="")
+        print("")
+    else:
+        response = await client.get_response(message, tools=get_weather)
+        print(f"Assistant: {response}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())