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"provenance": [],
"gpuType": "T4"
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"display_name": "Python 3"
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"language_info": {
"name": "python"
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"accelerator": "GPU"
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"cells": [
{
"cell_type": "markdown",
"source": [
"# Multiple-choice question"
],
"metadata": {
"id": "bjbqHUTuNFyd"
}
},
{
"cell_type": "markdown",
"source": [
"# 1. Install Litelines"
],
"metadata": {
"id": "B8jIr1KAKQWF"
}
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"id": "cvgtiC0Kcl-z"
},
"outputs": [],
"source": [
"%pip install --quiet --upgrade litelines"
]
},
{
"cell_type": "markdown",
"source": [
"## 2. Download a model and its tokenizer"
],
"metadata": {
"id": "-dLJS16ZNy97"
}
},
{
"cell_type": "code",
"source": [
"# Use cuda for faster inference\n",
"import torch\n",
"\n",
"device = torch.device(\"cuda\") if torch.cuda.is_available() else torch.device(\"cpu\")\n",
"assert device == torch.device(\"cuda\"), \"In the Runtime tab, please Change runtime type to GPU\""
],
"metadata": {
"id": "68zKdmOQcqLo"
},
"execution_count": 2,
"outputs": []
},
{
"cell_type": "code",
"source": [
"from transformers import AutoModelForCausalLM, AutoTokenizer\n",
"\n",
"MODEL_ID = \"Qwen/Qwen2.5-0.5B-Instruct\"\n",
"tokenizer = AutoTokenizer.from_pretrained(MODEL_ID)\n",
"model = AutoModelForCausalLM.from_pretrained(MODEL_ID).to(device)"
],
"metadata": {
"id": "U-a-w5jwc6Xg"
},
"execution_count": 3,
"outputs": []
},
{
"cell_type": "markdown",
"source": [
"## 3. Prepare the inputs to the LLM"
],
"metadata": {
"id": "ohUnAx9NJ7AV"
}
},
{
"cell_type": "code",
"source": [
"user_input = \"\"\"Which key combination exits Vim?\n",
"\n",
"A) Ctrl+X\n",
"B) Esc then :q!\n",
"C) Alt+F4\n",
"\"\"\"\n",
"messages = [{\"role\": \"user\", \"content\": user_input}]\n",
"inputs = tokenizer.apply_chat_template(\n",
" messages,\n",
" add_generation_prompt=True,\n",
" return_tensors=\"pt\",\n",
" return_dict=True\n",
").to(model.device)"
],
"metadata": {
"id": "Y8RtiZ7UefUx"
},
"execution_count": 4,
"outputs": []
},
{
"cell_type": "markdown",
"source": [
"## 4. Define a processor through a regular expression"
],
"metadata": {
"id": "9LaJrh0PKkcn"
}
},
{
"cell_type": "code",
"source": [
"from litelines.transformers import SchemaProcessor\n",
"\n",
"processor = SchemaProcessor(response_format=r\"A\\.|B\\.|C\\.\", tokenizer=tokenizer)\n",
"processor.show_graph()"
],
"metadata": {
"colab": {
"base_uri": "https://localhost:8080/",
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"id": "sVx6IzInKHoL",
"outputId": "6b6a373e-91cd-48ce-ed31-e198d2584dce"
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"cell_type": "markdown",
"source": [
"## 5. Generate a structured response"
],
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"id": "UUkc7wXcOQlN"
}
},
{
"cell_type": "code",
"source": [
"generated = model.generate(**inputs, logits_processor=[processor], temperature=0.1)\n",
"print(f\"Response: {tokenizer.decode(generated[0][inputs['input_ids'].shape[-1]:-1])}\")"
],
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"colab": {
"base_uri": "https://localhost:8080/"
},
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},
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"output_type": "stream",
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"text": [
"Response: B.\n"
]
}
]
},
{
"cell_type": "markdown",
"source": [
"## 6. Visualize the selected path"
],
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"id": "7ANqIJQ_M9fH"
}
},
{
"cell_type": "code",
"source": [
"processor.show_graph()"
],
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"id": "Pqo5AVexMnJ6",
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