[Core] Compatibility with function call style API (Azure OpenAI and Gemini)

autogen/agentchat/conversable_agent.py

@@ -1701,6 +1701,7 @@ def register_for_llm(
         *,
         name: Optional[str] = None,
         description: Optional[str] = None,
+        api_style: Literal["function", "tool"] = "tool",
     ) -> Callable[[F], F]:
         """Decorator factory for registering a function to be used by an agent.
 
@@ -1713,6 +1714,10 @@ def register_for_llm(
             name (optional(str)): name of the function. If None, the function name will be used (default: None).
             description (optional(str)): description of the function (default: None). It is mandatory
                 for the initial decorator, but the following ones can omit it.
+            api_style: (literal): the API style for function call.
+                For Azure OpenAI API, use version 2023-12-01-preview or later.
+                `"function"` style will be deprecated. For earlier version use
+                `"function"` if `"tool"` doesn't work.
 
         Returns:
             The decorator for registering a function to be used by an agent.
@@ -1726,6 +1731,14 @@ def my_function(a: Annotated[str, "description of a parameter"] = "a", b: int, c
                  return a + str(b * c)
             ```
 
+            For Azure OpenAI versions 2023-10-01-preview and earlier, set `api_style`
+            to `"function"` if `"tool"` doesn't work:
+            ```
+            @agent2.register_for_llm(api_style="function")
+            def my_function(a: Annotated[str, "description of a parameter"] = "a", b: int, c=3.14) -> str:
+                 return a + str(b * c)
+            ```
+
         """
 
         def _decorator(func: F) -> F:
@@ -1762,7 +1775,13 @@ def _decorator(func: F) -> F:
             if self.llm_config is None:
                 raise RuntimeError("LLM config must be setup before registering a function for LLM.")
 
-            self.update_tool_signature(f, is_remove=False)
+            if api_style == "function":
+                f = f["function"]
+                self.update_function_signature(f, is_remove=False)
+            elif api_style == "tool":
+                self.update_tool_signature(f, is_remove=False)
+            else:
+                raise ValueError(f"Unsupported API style: {api_style}")
 
             return func
 

test/agentchat/test_conversable_agent.py

@@ -677,6 +677,77 @@ async def exec_sh(script: Annotated[str, "Valid shell script to execute."]) -> s
         assert agent3.llm_config["tools"] == expected3
 
 
+def test_register_for_llm_api_style_function():
+    with pytest.MonkeyPatch.context() as mp:
+        mp.setenv("OPENAI_API_KEY", "mock")
+        agent3 = ConversableAgent(name="agent3", llm_config={"config_list": []})
+        agent2 = ConversableAgent(name="agent2", llm_config={"config_list": []})
+        agent1 = ConversableAgent(name="agent1", llm_config={"config_list": []})
+
+        @agent3.register_for_llm(api_style="function")
+        @agent2.register_for_llm(name="python", api_style="function")
+        @agent1.register_for_llm(
+            description="run cell in ipython and return the execution result.", api_style="function"
+        )
+        def exec_python(cell: Annotated[str, "Valid Python cell to execute."]) -> str:
+            pass
+
+        expected1 = [
+            {
+                "description": "run cell in ipython and return the execution result.",
+                "name": "exec_python",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "cell": {
+                            "type": "string",
+                            "description": "Valid Python cell to execute.",
+                        }
+                    },
+                    "required": ["cell"],
+                },
+            }
+        ]
+        expected2 = copy.deepcopy(expected1)
+        expected2[0]["name"] = "python"
+        expected3 = expected2
+
+        assert agent1.llm_config["functions"] == expected1
+        assert agent2.llm_config["functions"] == expected2
+        assert agent3.llm_config["functions"] == expected3
+
+        @agent3.register_for_llm(api_style="function")
+        @agent2.register_for_llm(api_style="function")
+        @agent1.register_for_llm(
+            name="sh", description="run a shell script and return the execution result.", api_style="function"
+        )
+        async def exec_sh(script: Annotated[str, "Valid shell script to execute."]) -> str:
+            pass
+
+        expected1 = expected1 + [
+            {
+                "name": "sh",
+                "description": "run a shell script and return the execution result.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "script": {
+                            "type": "string",
+                            "description": "Valid shell script to execute.",
+                        }
+                    },
+                    "required": ["script"],
+                },
+            }
+        ]
+        expected2 = expected2 + [expected1[1]]
+        expected3 = expected3 + [expected1[1]]
+
+        assert agent1.llm_config["functions"] == expected1
+        assert agent2.llm_config["functions"] == expected2
+        assert agent3.llm_config["functions"] == expected3
+
+
 def test_register_for_llm_without_description():
     with pytest.MonkeyPatch.context() as mp:
         mp.setenv("OPENAI_API_KEY", "mock")

test/agentchat/test_tool_calls.py

@@ -75,6 +75,62 @@ def test_eval_math_responses():
     print(eval_math_responses(**arguments))
 
 
+@pytest.mark.skipif(skip_openai or not TOOL_ENABLED, reason="openai>=1.1.0 not installed or requested to skip")
+def test_eval_math_responses_api_style_function():
+    config_list = autogen.config_list_from_models(
+        KEY_LOC,
+        model_list=["gpt-4-0613", "gpt-3.5-turbo-0613", "gpt-3.5-turbo-16k"],
+        filter_dict={
+            "api_type": ["azure"],
+            "api_version": ["2023-10-01-preview", "2023-09-01-preview", "2023-08-01-preview", "2023-07-01-preview"],
+        },
+    )
+    functions = [
+        {
+            "name": "eval_math_responses",
+            "description": "Select a response for a math problem using voting, and check if the response is correct if the solution is provided",
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "responses": {
+                        "type": "array",
+                        "items": {"type": "string"},
+                        "description": "The responses in a list",
+                    },
+                    "solution": {
+                        "type": "string",
+                        "description": "The canonical solution",
+                    },
+                },
+                "required": ["responses"],
+            },
+        },
+    ]
+    client = autogen.OpenAIWrapper(config_list=config_list)
+    response = client.create(
+        messages=[
+            {
+                "role": "user",
+                "content": 'evaluate the math responses ["1", "5/2", "5/2"] against the true answer \\frac{5}{2}',
+            },
+        ],
+        functions=functions,
+    )
+    print(response)
+    responses = client.extract_text_or_completion_object(response)
+    print(responses[0])
+    function_call = responses[0].function_call
+    name, arguments = function_call.name, json.loads(function_call.arguments)
+    assert name == "eval_math_responses"
+    print(arguments["responses"])
+    # if isinstance(arguments["responses"], str):
+    #     arguments["responses"] = json.loads(arguments["responses"])
+    arguments["responses"] = [f"\\boxed{{{x}}}" for x in arguments["responses"]]
+    print(arguments["responses"])
+    arguments["solution"] = f"\\boxed{{{arguments['solution']}}}"
+    print(eval_math_responses(**arguments))
+
+
 @pytest.mark.skipif(
     skip_openai or not TOOL_ENABLED or not sys.version.startswith("3.10"),
     reason="do not run if openai is <1.1.0 or py!=3.10 or requested to skip",

website/docs/Use-Cases/agent_chat.md

@@ -113,7 +113,11 @@ def exchange_rate(base_currency: CurrencySymbol, quote_currency: CurrencySymbol)
     else:
         raise ValueError(f"Unknown currencies {base_currency}, {quote_currency}")
 
-
+# NOTE: for Azure OpenAI, please use API version 2023-12-01-preview or later as
+# support for earlier versions will be deprecated.
+# For API versions 2023-10-01-preview or earlier you may
+# need to set `api_style="function"` in the decorator if the default value does not work:
+# `register_for_llm(description=..., api_style="function")`.
 @user_proxy.register_for_execution()
 @chatbot.register_for_llm(description="Currency exchange calculator.")
 def currency_calculator(