[docs] update agent cookbook lcel (#15349)

docs/docs/expression_language/cookbook/agent.ipynb

@@ -12,18 +12,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 8,
    "id": "af4381de",
    "metadata": {},
    "outputs": [],
    "source": [
-    "from langchain.agents import AgentExecutor, XMLAgent, tool\n",
+    "from langchain import hub\n",
+    "from langchain.agents import AgentExecutor, tool\n",
+    "from langchain.agents.output_parsers import XMLAgentOutputParser\n",
     "from langchain.chat_models import ChatAnthropic"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 3,
    "id": "24cc8134",
    "metadata": {},
    "outputs": [],
@@ -33,7 +35,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 4,
    "id": "67c0b0e4",
    "metadata": {},
    "outputs": [],
@@ -46,7 +48,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 5,
    "id": "7203b101",
    "metadata": {},
    "outputs": [],
@@ -56,18 +58,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 6,
    "id": "b68e756d",
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Get prompt to use\n",
-    "prompt = XMLAgent.get_default_prompt()"
+    "# Get the prompt to use - you can modify this!\n",
+    "prompt = hub.pull(\"hwchase17/xml-agent-convo\")"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 7,
    "id": "61ab3e9a",
    "metadata": {},
    "outputs": [],
@@ -107,27 +109,27 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 12,
    "id": "e92f1d6f",
    "metadata": {},
    "outputs": [],
    "source": [
     "agent = (\n",
     "    {\n",
-    "        \"question\": lambda x: x[\"question\"],\n",
-    "        \"intermediate_steps\": lambda x: convert_intermediate_steps(\n",
+    "        \"input\": lambda x: x[\"input\"],\n",
+    "        \"agent_scratchpad\": lambda x: convert_intermediate_steps(\n",
     "            x[\"intermediate_steps\"]\n",
     "        ),\n",
     "    }\n",
     "    | prompt.partial(tools=convert_tools(tool_list))\n",
     "    | model.bind(stop=[\"</tool_input>\", \"</final_answer>\"])\n",
-    "    | XMLAgent.get_default_output_parser()\n",
+    "    | XMLAgentOutputParser()\n",
     ")"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 13,
    "id": "6ce6ec7a",
    "metadata": {},
    "outputs": [],
@@ -137,7 +139,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 14,
    "id": "fb5cb2e3",
    "metadata": {},
    "outputs": [
@@ -148,10 +150,8 @@
       "\n",
       "\n",
       "\u001b[1m> Entering new AgentExecutor chain...\u001b[0m\n",
-      "\u001b[32;1m\u001b[1;3m <tool>search</tool>\n",
-      "<tool_input>weather in new york\u001b[0m\u001b[36;1m\u001b[1;3m32 degrees\u001b[0m\u001b[32;1m\u001b[1;3m\n",
-      "\n",
-      "<final_answer>The weather in New York is 32 degrees\u001b[0m\n",
+      "\u001b[32;1m\u001b[1;3m <tool>search</tool><tool_input>weather in New York\u001b[0m\u001b[36;1m\u001b[1;3m32 degrees\u001b[0m\u001b[32;1m\u001b[1;3m <tool>search</tool>\n",
+      "<tool_input>weather in New York\u001b[0m\u001b[36;1m\u001b[1;3m32 degrees\u001b[0m\u001b[32;1m\u001b[1;3m <final_answer>The weather in New York is 32 degrees\u001b[0m\n",
       "\n",
       "\u001b[1m> Finished chain.\u001b[0m\n"
      ]
@@ -159,17 +159,17 @@
     {
      "data": {
       "text/plain": [
-       "{'question': 'whats the weather in New york?',\n",
+       "{'input': 'whats the weather in New york?',\n",
        " 'output': 'The weather in New York is 32 degrees'}"
       ]
      },
-     "execution_count": 9,
+     "execution_count": 14,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
    "source": [
-    "agent_executor.invoke({\"question\": \"whats the weather in New york?\"})"
+    "agent_executor.invoke({\"input\": \"whats the weather in New york?\"})"
    ]
   },
   {