Fix for http client (#2579)

* Fix for http client

* fixed constructor to only ignore the http_client while copying

* fixed comment formating

* removed check for http_client and added error message with docs

* fix formatting

* fix formatting

* added test for http-fix

* changed title and content of docs

* changed test func name

autogen/agentchat/conversable_agent.py

@@ -149,7 +149,13 @@ def __init__(
         )
         # Take a copy to avoid modifying the given dict
         if isinstance(llm_config, dict):
-            llm_config = copy.deepcopy(llm_config)
+            try:
+                llm_config = copy.deepcopy(llm_config)
+            except TypeError as e:
+                raise TypeError(
+                    "Please implement __deepcopy__ method for each value class in llm_config to support deepcopy."
+                    " Refer to the docs for more details: https://microsoft.github.io/autogen/docs/topics/llm_configuration#adding-http-client-in-llm_config-for-proxy"
+                ) from e
 
         self._validate_llm_config(llm_config)
 

test/agentchat/test_conversable_agent.py

@@ -1382,6 +1382,27 @@ def bob_initiate_chat(agent: ConversableAgent, text: Literal["past", "future"]):
     assert bob.chat_messages[charlie][-2]["content"] == "This is bob from the future speaking."
 
 
+def test_http_client():
+
+    import httpx
+
+    with pytest.raises(TypeError):
+        config_list = [
+            {
+                "model": "my-gpt-4-deployment",
+                "api_key": "",
+                "http_client": httpx.Client(),
+            }
+        ]
+
+        autogen.ConversableAgent(
+            "test_agent",
+            human_input_mode="NEVER",
+            llm_config={"config_list": config_list},
+            default_auto_reply="This is alice speaking.",
+        )
+
+
 if __name__ == "__main__":
     # test_trigger()
     # test_context()

website/docs/topics/llm_configuration.ipynb

@@ -254,6 +254,44 @@
     "assert len(config_list) == 1"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Adding http client in llm_config for proxy\n",
+    "\n",
+    "In Autogen, a deepcopy is used on llm_config to ensure that the llm_config passed by user is not modified internally. You may get an error if the llm_config contains objects of a class that do not support deepcopy. To fix this, you need to implement a `__deepcopy__` method for the class.\n",
+    "\n",
+    "The below example shows how to implement a `__deepcopy__` method for http client and add a  proxy."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#!pip install httpx\n",
+    "import httpx\n",
+    "\n",
+    "\n",
+    "class MyHttpClient(httpx.Client):\n",
+    "    def __deepcopy__(self, memo):\n",
+    "        return self\n",
+    "\n",
+    "config_list = [\n",
+    "    {\n",
+    "        \"model\": \"my-gpt-4-deployment\",\n",
+    "        \"api_key\": \"\",\n",
+    "        \"http_client\": MyHttpClient(proxy=\"http://localhost:8030\"),\n",
+    "    }\n",
+    "]\n",
+    "\n",
+    "llm_config = {\n",
+    "    \"config_list\": config_list,\n",
+    "}"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},