langgraph-example/examples/python/notebooks/stream_updates.ipynb

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   "source": [
    "# How to stream updates from your graph\n",
    "\n",
    "There are multiple different streaming modes.\n",
    "\n",
    "- `values`: This streaming mode streams back values of the graph. This is the **full state of the graph** after each node is called.\n",
    "- `updates`: This streaming mode streams back updates to the graph. This is the **update to the state of the graph** after each node is called.\n",
    "- `messages`: This streaming mode streams back messages - both complete messages (at the end of a node) as well as **tokens** for any messages generated inside a node. This mode is primarily meant for powering chat applications.\n",
    "\n",
    "\n",
    "This notebook covers `streaming_mode=\"updates\"`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "521d975b-e94b-4c37-bfa1-82d969e2a4dc",
   "metadata": {},
   "outputs": [],
   "source": [
    "from langgraph_sdk import get_client"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "27a1392b-86c3-464e-99a8-90ffc965f3ec",
   "metadata": {},
   "outputs": [],
   "source": [
    "client = get_client()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "230c0464-a6e5-420f-9e38-ca514e5634ce",
   "metadata": {},
   "outputs": [],
   "source": [
    "assistant_id = \"agent\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "56aa5159-5583-4134-9210-709b969bda6f",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'thread_id': '979e3c89-a702-4882-87c2-7a59a250ce16',\n",
       " 'created_at': '2024-06-21T15:22:07.453100+00:00',\n",
       " 'updated_at': '2024-06-21T15:22:07.453100+00:00',\n",
       " 'metadata': {}}"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "thread = await client.threads.create()\n",
    "thread"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "147c3f98-f889-4f05-a090-6b31f2a0b291",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[]"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "runs = await client.runs.list(thread['thread_id'])\n",
    "runs"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "7da70e20-1a4e-4df2-b996-1927f474c835",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Receiving new event of type: metadata...\n",
      "{'run_id': 'cfc96c16-ed9a-44bd-b5bb-c30e3c0725f0'}\n",
      "\n",
      "\n",
      "\n",
      "Receiving new event of type: data...\n",
      "{'agent': {'messages': [{'content': [{'id': 'toolu_0148tMmDK51iLQfG1yaNwRHM', 'input': {'query': 'weather in los angeles'}, 'name': 'tavily_search_results_json', 'type': 'tool_use'}], 'additional_kwargs': {}, 'response_metadata': {}, 'type': 'ai', 'name': None, 'id': 'run-1a9d32b0-7007-4a36-abde-8df812a0ed94', 'example': False, 'tool_calls': [{'name': 'tavily_search_results_json', 'args': {'query': 'weather in los angeles'}, 'id': 'toolu_0148tMmDK51iLQfG1yaNwRHM'}], 'invalid_tool_calls': []}]}}\n",
      "\n",
      "\n",
      "\n",
      "Receiving new event of type: data...\n",
      "{'action': {'messages': [{'content': '[{\"url\": \"https://www.weatherapi.com/\", \"content\": \"{\\'location\\': {\\'name\\': \\'Los Angeles\\', \\'region\\': \\'California\\', \\'country\\': \\'United States of America\\', \\'lat\\': 34.05, \\'lon\\': -118.24, \\'tz_id\\': \\'America/Los_Angeles\\', \\'localtime_epoch\\': 1716062239, \\'localtime\\': \\'2024-05-18 12:57\\'}, \\'current\\': {\\'last_updated_epoch\\': 1716061500, \\'last_updated\\': \\'2024-05-18 12:45\\', \\'temp_c\\': 18.9, \\'temp_f\\': 66.0, \\'is_day\\': 1, \\'condition\\': {\\'text\\': \\'Overcast\\', \\'icon\\': \\'//cdn.weatherapi.com/weather/64x64/day/122.png\\', \\'code\\': 1009}, \\'wind_mph\\': 2.2, \\'wind_kph\\': 3.6, \\'wind_degree\\': 10, \\'wind_dir\\': \\'N\\', \\'pressure_mb\\': 1017.0, \\'pressure_in\\': 30.02, \\'precip_mm\\': 0.0, \\'precip_in\\': 0.0, \\'humidity\\': 65, \\'cloud\\': 100, \\'feelslike_c\\': 18.9, \\'feelslike_f\\': 66.0, \\'vis_km\\': 16.0, \\'vis_miles\\': 9.0, \\'uv\\': 6.0, \\'gust_mph\\': 7.5, \\'gust_kph\\': 12.0}}\"}]', 'additional_kwargs': {}, 'response_metadata': {}, 'type': 'tool', 'name': 'tavily_search_results_json', 'id': 'a36e8cd1-0e96-4417-9c15-f10a945d2b42', 'tool_call_id': 'toolu_0148tMmDK51iLQfG1yaNwRHM'}]}}\n",
      "\n",
      "\n",
      "\n",
      "Receiving new event of type: data...\n",
      "{'agent': {'messages': [{'content': 'The weather in Los Angeles is currently overcast with a temperature of around 66°F (18.9°C). There are light winds from the north at around 2-3 mph. The humidity is 65% and visibility is good at 9 miles. Overall, mild spring weather conditions in LA.', 'additional_kwargs': {}, 'response_metadata': {}, 'type': 'ai', 'name': None, 'id': 'run-d5c1c2f0-b12d-41ce-990b-f36570e7483d', 'example': False, 'tool_calls': [], 'invalid_tool_calls': []}]}}\n",
      "\n",
      "\n",
      "\n",
      "Receiving new event of type: end...\n",
      "None\n",
      "\n",
      "\n",
      "\n"
     ]
    }
   ],
   "source": [
    "input = {\"messages\": [{\"role\": \"human\", \"content\": \"whats the weather in la\"}]}\n",
    "async for chunk in client.runs.stream(thread['thread_id'], assistant_id, input=input, stream_mode=\"updates\", ):\n",
    "    print(f\"Receiving new event of type: {chunk.event}...\")\n",
    "    print(chunk.data)\n",
    "    print(\"\\n\\n\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "53800469-354a-4739-8e77-b88044c772d5",
   "metadata": {},
   "outputs": [],
   "source": []
  }
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