{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# OpenAI APIs - Completions\n",
    "\n",
    "SGLang provides OpenAI-compatible APIs to enable a smooth transition from OpenAI services to self-hosted local models.\n",
    "A complete reference for the API is available in the [OpenAI API Reference](https://platform.openai.com/docs/api-reference).\n",
    "\n",
    "This tutorial covers the following popular APIs:\n",
    "\n",
    "- `chat/completions`\n",
    "- `completions`\n",
    "- `batches`\n",
    "\n",
    "Check out other tutorials to learn about vision APIs for vision-language models and embedding APIs for embedding models."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Launch A Server\n",
    "\n",
    "This code block is equivalent to executing \n",
    "\n",
    "```bash\n",
    "python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3.1-8B-Instruct \\\n",
    "--port 30000 --host 0.0.0.0\n",
    "```\n",
    "\n",
    "in your terminal and wait for the server to be ready."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:46:54.813876Z",
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     "iopub.status.idle": "2024-11-07T18:47:24.015527Z",
     "shell.execute_reply": "2024-11-07T18:47:24.014987Z"
    }
   },
   "outputs": [],
   "source": [
    "from sglang.utils import (\n",
    "    execute_shell_command,\n",
    "    wait_for_server,\n",
    "    terminate_process,\n",
    "    print_highlight,\n",
    ")\n",
    "\n",
    "server_process = execute_shell_command(\n",
    "    \"python -m sglang.launch_server --model-path meta-llama/Meta-Llama-3.1-8B-Instruct --port 30000 --host 0.0.0.0\"\n",
    ")\n",
    "\n",
    "wait_for_server(\"http://localhost:30000\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Chat Completions\n",
    "\n",
    "### Usage\n",
    "\n",
    "The server fully implements the OpenAI API.\n",
    "It will automatically apply the chat template specified in the Hugging Face tokenizer, if one is available.\n",
    "You can also specify a custom chat template with `--chat-template` when launching the server."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:24.018153Z",
     "iopub.status.busy": "2024-11-07T18:47:24.017755Z",
     "iopub.status.idle": "2024-11-07T18:47:25.374821Z",
     "shell.execute_reply": "2024-11-07T18:47:25.374397Z"
    }
   },
   "outputs": [],
   "source": [
    "import openai\n",
    "\n",
    "client = openai.Client(base_url=\"http://127.0.0.1:30000/v1\", api_key=\"None\")\n",
    "\n",
    "response = client.chat.completions.create(\n",
    "    model=\"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    messages=[\n",
    "        {\"role\": \"user\", \"content\": \"List 3 countries and their capitals.\"},\n",
    "    ],\n",
    "    temperature=0,\n",
    "    max_tokens=64,\n",
    ")\n",
    "\n",
    "print_highlight(f\"Response: {response}\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Parameters\n",
    "\n",
    "The chat completions API accepts OpenAI Chat Completions API's parameters. Refer to [OpenAI Chat Completions API](https://platform.openai.com/docs/api-reference/chat/create) for more details.\n",
    "\n",
    "Here is an example of a detailed chat completion request:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:25.376617Z",
     "iopub.status.busy": "2024-11-07T18:47:25.376495Z",
     "iopub.status.idle": "2024-11-07T18:47:28.482537Z",
     "shell.execute_reply": "2024-11-07T18:47:28.482125Z"
    }
   },
   "outputs": [],
   "source": [
    "response = client.chat.completions.create(\n",
    "    model=\"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    messages=[\n",
    "        {\n",
    "            \"role\": \"system\",\n",
    "            \"content\": \"You are a knowledgeable historian who provides concise responses.\",\n",
    "        },\n",
    "        {\"role\": \"user\", \"content\": \"Tell me about ancient Rome\"},\n",
    "        {\n",
    "            \"role\": \"assistant\",\n",
    "            \"content\": \"Ancient Rome was a civilization centered in Italy.\",\n",
    "        },\n",
    "        {\"role\": \"user\", \"content\": \"What were their major achievements?\"},\n",
    "    ],\n",
    "    temperature=0.3,  # Lower temperature for more focused responses\n",
    "    max_tokens=128,  # Reasonable length for a concise response\n",
    "    top_p=0.95,  # Slightly higher for better fluency\n",
    "    presence_penalty=0.2,  # Mild penalty to avoid repetition\n",
    "    frequency_penalty=0.2,  # Mild penalty for more natural language\n",
    "    n=1,  # Single response is usually more stable\n",
    "    seed=42,  # Keep for reproducibility\n",
    ")\n",
    "\n",
    "print_highlight(response.choices[0].message.content)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Streaming mode is also supported."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:28.484819Z",
     "iopub.status.busy": "2024-11-07T18:47:28.484673Z",
     "iopub.status.idle": "2024-11-07T18:47:28.659814Z",
     "shell.execute_reply": "2024-11-07T18:47:28.659435Z"
    }
   },
   "outputs": [],
   "source": [
    "stream = client.chat.completions.create(\n",
    "    model=\"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    messages=[{\"role\": \"user\", \"content\": \"Say this is a test\"}],\n",
    "    stream=True,\n",
    ")\n",
    "for chunk in stream:\n",
    "    if chunk.choices[0].delta.content is not None:\n",
    "        print(chunk.choices[0].delta.content, end=\"\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Completions\n",
    "\n",
    "### Usage\n",
    "Completions API is similar to Chat Completions API, but without the `messages` parameter or chat templates."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:28.661844Z",
     "iopub.status.busy": "2024-11-07T18:47:28.661710Z",
     "iopub.status.idle": "2024-11-07T18:47:30.168922Z",
     "shell.execute_reply": "2024-11-07T18:47:30.168600Z"
    }
   },
   "outputs": [],
   "source": [
    "response = client.completions.create(\n",
    "    model=\"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    prompt=\"List 3 countries and their capitals.\",\n",
    "    temperature=0,\n",
    "    max_tokens=64,\n",
    "    n=1,\n",
    "    stop=None,\n",
    ")\n",
    "\n",
    "print_highlight(f\"Response: {response}\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Parameters\n",
    "\n",
    "The completions API accepts OpenAI Completions API's parameters.  Refer to [OpenAI Completions API](https://platform.openai.com/docs/api-reference/completions/create) for more details.\n",
    "\n",
    "Here is an example of a detailed completions request:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:30.171319Z",
     "iopub.status.busy": "2024-11-07T18:47:30.171176Z",
     "iopub.status.idle": "2024-11-07T18:47:33.760113Z",
     "shell.execute_reply": "2024-11-07T18:47:33.759713Z"
    }
   },
   "outputs": [],
   "source": [
    "response = client.completions.create(\n",
    "    model=\"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    prompt=\"Write a short story about a space explorer.\",\n",
    "    temperature=0.7,  # Moderate temperature for creative writing\n",
    "    max_tokens=150,  # Longer response for a story\n",
    "    top_p=0.9,  # Balanced diversity in word choice\n",
    "    stop=[\"\\n\\n\", \"THE END\"],  # Multiple stop sequences\n",
    "    presence_penalty=0.3,  # Encourage novel elements\n",
    "    frequency_penalty=0.3,  # Reduce repetitive phrases\n",
    "    n=1,  # Generate one completion\n",
    "    seed=123,  # For reproducible results\n",
    ")\n",
    "\n",
    "print_highlight(f\"Response: {response}\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Structured decoding (JSON, Regex)\n",
    "You can specify a JSON schema or a regular expression to constrain the model output. The model output will be guaranteed to follow the given constraints.\n",
    "\n",
    "### JSON"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:33.762729Z",
     "iopub.status.busy": "2024-11-07T18:47:33.762590Z",
     "iopub.status.idle": "2024-11-07T18:47:34.255316Z",
     "shell.execute_reply": "2024-11-07T18:47:34.254907Z"
    }
   },
   "outputs": [],
   "source": [
    "import json\n",
    "\n",
    "json_schema = json.dumps(\n",
    "    {\n",
    "        \"type\": \"object\",\n",
    "        \"properties\": {\n",
    "            \"name\": {\"type\": \"string\", \"pattern\": \"^[\\\\w]+$\"},\n",
    "            \"population\": {\"type\": \"integer\"},\n",
    "        },\n",
    "        \"required\": [\"name\", \"population\"],\n",
    "    }\n",
    ")\n",
    "\n",
    "response = client.chat.completions.create(\n",
    "    model=\"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    messages=[\n",
    "        {\n",
    "            \"role\": \"user\",\n",
    "            \"content\": \"Give me the information of the capital of France in the JSON format.\",\n",
    "        },\n",
    "    ],\n",
    "    temperature=0,\n",
    "    max_tokens=128,\n",
    "    response_format={\n",
    "        \"type\": \"json_schema\",\n",
    "        \"json_schema\": {\"name\": \"foo\", \"schema\": json.loads(json_schema)},\n",
    "    },\n",
    ")\n",
    "\n",
    "print_highlight(response.choices[0].message.content)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Regular expression"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:34.257393Z",
     "iopub.status.busy": "2024-11-07T18:47:34.257246Z",
     "iopub.status.idle": "2024-11-07T18:47:34.413506Z",
     "shell.execute_reply": "2024-11-07T18:47:34.413172Z"
    }
   },
   "outputs": [],
   "source": [
    "response = client.chat.completions.create(\n",
    "    model=\"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "    messages=[\n",
    "        {\"role\": \"user\", \"content\": \"What is the capital of France?\"},\n",
    "    ],\n",
    "    temperature=0,\n",
    "    max_tokens=128,\n",
    "    extra_body={\"regex\": \"(Paris|London)\"},\n",
    ")\n",
    "\n",
    "print_highlight(response.choices[0].message.content)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Batches\n",
    "\n",
    "Batches API for chat completions and completions are also supported. You can upload your requests in `jsonl` files, create a batch job, and retrieve the results when the batch job is completed (which takes longer but costs less).\n",
    "\n",
    "The batches APIs are:\n",
    "\n",
    "- `batches`\n",
    "- `batches/{batch_id}/cancel`\n",
    "- `batches/{batch_id}`\n",
    "\n",
    "Here is an example of a batch job for chat completions, completions are similar.\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:34.414816Z",
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     "iopub.status.idle": "2024-11-07T18:47:34.431341Z",
     "shell.execute_reply": "2024-11-07T18:47:34.431081Z"
    }
   },
   "outputs": [],
   "source": [
    "import json\n",
    "import time\n",
    "from openai import OpenAI\n",
    "\n",
    "client = OpenAI(base_url=\"http://127.0.0.1:30000/v1\", api_key=\"None\")\n",
    "\n",
    "requests = [\n",
    "    {\n",
    "        \"custom_id\": \"request-1\",\n",
    "        \"method\": \"POST\",\n",
    "        \"url\": \"/chat/completions\",\n",
    "        \"body\": {\n",
    "            \"model\": \"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "            \"messages\": [\n",
    "                {\"role\": \"user\", \"content\": \"Tell me a joke about programming\"}\n",
    "            ],\n",
    "            \"max_tokens\": 50,\n",
    "        },\n",
    "    },\n",
    "    {\n",
    "        \"custom_id\": \"request-2\",\n",
    "        \"method\": \"POST\",\n",
    "        \"url\": \"/chat/completions\",\n",
    "        \"body\": {\n",
    "            \"model\": \"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "            \"messages\": [{\"role\": \"user\", \"content\": \"What is Python?\"}],\n",
    "            \"max_tokens\": 50,\n",
    "        },\n",
    "    },\n",
    "]\n",
    "\n",
    "input_file_path = \"batch_requests.jsonl\"\n",
    "\n",
    "with open(input_file_path, \"w\") as f:\n",
    "    for req in requests:\n",
    "        f.write(json.dumps(req) + \"\\n\")\n",
    "\n",
    "with open(input_file_path, \"rb\") as f:\n",
    "    file_response = client.files.create(file=f, purpose=\"batch\")\n",
    "\n",
    "batch_response = client.batches.create(\n",
    "    input_file_id=file_response.id,\n",
    "    endpoint=\"/v1/chat/completions\",\n",
    "    completion_window=\"24h\",\n",
    ")\n",
    "\n",
    "print_highlight(f\"Batch job created with ID: {batch_response.id}\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:34.432325Z",
     "iopub.status.busy": "2024-11-07T18:47:34.432208Z",
     "iopub.status.idle": "2024-11-07T18:47:37.444337Z",
     "shell.execute_reply": "2024-11-07T18:47:37.444000Z"
    }
   },
   "outputs": [],
   "source": [
    "while batch_response.status not in [\"completed\", \"failed\", \"cancelled\"]:\n",
    "    time.sleep(3)\n",
    "    print(f\"Batch job status: {batch_response.status}...trying again in 3 seconds...\")\n",
    "    batch_response = client.batches.retrieve(batch_response.id)\n",
    "\n",
    "if batch_response.status == \"completed\":\n",
    "    print(\"Batch job completed successfully!\")\n",
    "    print(f\"Request counts: {batch_response.request_counts}\")\n",
    "\n",
    "    result_file_id = batch_response.output_file_id\n",
    "    file_response = client.files.content(result_file_id)\n",
    "    result_content = file_response.read().decode(\"utf-8\")\n",
    "\n",
    "    results = [\n",
    "        json.loads(line) for line in result_content.split(\"\\n\") if line.strip() != \"\"\n",
    "    ]\n",
    "\n",
    "    for result in results:\n",
    "        print_highlight(f\"Request {result['custom_id']}:\")\n",
    "        print_highlight(f\"Response: {result['response']}\")\n",
    "\n",
    "    print_highlight(\"Cleaning up files...\")\n",
    "    # Only delete the result file ID since file_response is just content\n",
    "    client.files.delete(result_file_id)\n",
    "else:\n",
    "    print_highlight(f\"Batch job failed with status: {batch_response.status}\")\n",
    "    if hasattr(batch_response, \"errors\"):\n",
    "        print_highlight(f\"Errors: {batch_response.errors}\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "It takes a while to complete the batch job. You can use these two APIs to retrieve the batch job status or cancel the batch job.\n",
    "\n",
    "1. `batches/{batch_id}`: Retrieve the batch job status.\n",
    "2. `batches/{batch_id}/cancel`: Cancel the batch job.\n",
    "\n",
    "Here is an example to check the batch job status."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:47:37.445894Z",
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     "shell.execute_reply": "2024-11-07T18:48:02.482042Z"
    }
   },
   "outputs": [],
   "source": [
    "import json\n",
    "import time\n",
    "from openai import OpenAI\n",
    "\n",
    "client = OpenAI(base_url=\"http://127.0.0.1:30000/v1\", api_key=\"None\")\n",
    "\n",
    "requests = []\n",
    "for i in range(100):\n",
    "    requests.append(\n",
    "        {\n",
    "            \"custom_id\": f\"request-{i}\",\n",
    "            \"method\": \"POST\",\n",
    "            \"url\": \"/chat/completions\",\n",
    "            \"body\": {\n",
    "                \"model\": \"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "                \"messages\": [\n",
    "                    {\n",
    "                        \"role\": \"system\",\n",
    "                        \"content\": f\"{i}: You are a helpful AI assistant\",\n",
    "                    },\n",
    "                    {\n",
    "                        \"role\": \"user\",\n",
    "                        \"content\": \"Write a detailed story about topic. Make it very long.\",\n",
    "                    },\n",
    "                ],\n",
    "                \"max_tokens\": 500,\n",
    "            },\n",
    "        }\n",
    "    )\n",
    "\n",
    "input_file_path = \"batch_requests.jsonl\"\n",
    "with open(input_file_path, \"w\") as f:\n",
    "    for req in requests:\n",
    "        f.write(json.dumps(req) + \"\\n\")\n",
    "\n",
    "with open(input_file_path, \"rb\") as f:\n",
    "    uploaded_file = client.files.create(file=f, purpose=\"batch\")\n",
    "\n",
    "batch_job = client.batches.create(\n",
    "    input_file_id=uploaded_file.id,\n",
    "    endpoint=\"/v1/chat/completions\",\n",
    "    completion_window=\"24h\",\n",
    ")\n",
    "\n",
    "print_highlight(f\"Created batch job with ID: {batch_job.id}\")\n",
    "print_highlight(f\"Initial status: {batch_job.status}\")\n",
    "\n",
    "time.sleep(10)\n",
    "\n",
    "max_checks = 5\n",
    "for i in range(max_checks):\n",
    "    batch_details = client.batches.retrieve(batch_id=batch_job.id)\n",
    "\n",
    "    print_highlight(\n",
    "        f\"Batch job details (check {i+1} / {max_checks}) // ID: {batch_details.id} // Status: {batch_details.status} // Created at: {batch_details.created_at} // Input file ID: {batch_details.input_file_id} // Output file ID: {batch_details.output_file_id}\"\n",
    "    )\n",
    "    print_highlight(\n",
    "        f\"<strong>Request counts: Total: {batch_details.request_counts.total} // Completed: {batch_details.request_counts.completed} // Failed: {batch_details.request_counts.failed}</strong>\"\n",
    "    )\n",
    "\n",
    "    time.sleep(3)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Here is an example to cancel a batch job."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "execution": {
     "iopub.execute_input": "2024-11-07T18:48:02.485206Z",
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     "iopub.status.idle": "2024-11-07T18:48:15.521489Z",
     "shell.execute_reply": "2024-11-07T18:48:15.521156Z"
    }
   },
   "outputs": [],
   "source": [
    "import json\n",
    "import time\n",
    "from openai import OpenAI\n",
    "import os\n",
    "\n",
    "client = OpenAI(base_url=\"http://127.0.0.1:30000/v1\", api_key=\"None\")\n",
    "\n",
    "requests = []\n",
    "for i in range(500):\n",
    "    requests.append(\n",
    "        {\n",
    "            \"custom_id\": f\"request-{i}\",\n",
    "            \"method\": \"POST\",\n",
    "            \"url\": \"/chat/completions\",\n",
    "            \"body\": {\n",
    "                \"model\": \"meta-llama/Meta-Llama-3.1-8B-Instruct\",\n",
    "                \"messages\": [\n",
    "                    {\n",
    "                        \"role\": \"system\",\n",
    "                        \"content\": f\"{i}: You are a helpful AI assistant\",\n",
    "                    },\n",
    "                    {\n",
    "                        \"role\": \"user\",\n",
    "                        \"content\": \"Write a detailed story about topic. Make it very long.\",\n",
    "                    },\n",
    "                ],\n",
    "                \"max_tokens\": 500,\n",
    "            },\n",
    "        }\n",
    "    )\n",
    "\n",
    "input_file_path = \"batch_requests.jsonl\"\n",
    "with open(input_file_path, \"w\") as f:\n",
    "    for req in requests:\n",
    "        f.write(json.dumps(req) + \"\\n\")\n",
    "\n",
    "with open(input_file_path, \"rb\") as f:\n",
    "    uploaded_file = client.files.create(file=f, purpose=\"batch\")\n",
    "\n",
    "batch_job = client.batches.create(\n",
    "    input_file_id=uploaded_file.id,\n",
    "    endpoint=\"/v1/chat/completions\",\n",
    "    completion_window=\"24h\",\n",
    ")\n",
    "\n",
    "print_highlight(f\"Created batch job with ID: {batch_job.id}\")\n",
    "print_highlight(f\"Initial status: {batch_job.status}\")\n",
    "\n",
    "time.sleep(10)\n",
    "\n",
    "try:\n",
    "    cancelled_job = client.batches.cancel(batch_id=batch_job.id)\n",
    "    print_highlight(f\"Cancellation initiated. Status: {cancelled_job.status}\")\n",
    "    assert cancelled_job.status == \"cancelling\"\n",
    "\n",
    "    # Monitor the cancellation process\n",
    "    while cancelled_job.status not in [\"failed\", \"cancelled\"]:\n",
    "        time.sleep(3)\n",
    "        cancelled_job = client.batches.retrieve(batch_job.id)\n",
    "        print_highlight(f\"Current status: {cancelled_job.status}\")\n",
    "\n",
    "    # Verify final status\n",
    "    assert cancelled_job.status == \"cancelled\"\n",
    "    print_highlight(\"Batch job successfully cancelled\")\n",
    "\n",
    "except Exception as e:\n",
    "    print_highlight(f\"Error during cancellation: {e}\")\n",
    "    raise e\n",
    "\n",
    "finally:\n",
    "    try:\n",
    "        del_response = client.files.delete(uploaded_file.id)\n",
    "        if del_response.deleted:\n",
    "            print_highlight(\"Successfully cleaned up input file\")\n",
    "        if os.path.exists(input_file_path):\n",
    "            os.remove(input_file_path)\n",
    "            print_highlight(\"Successfully deleted local batch_requests.jsonl file\")\n",
    "    except Exception as e:\n",
    "        print_highlight(f\"Error cleaning up: {e}\")\n",
    "        raise e"
   ]
  },
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   "cell_type": "code",
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     "shell.execute_reply": "2024-11-07T18:48:16.874847Z"
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   "source": [
    "terminate_process(server_process)"
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