training loop

Author: lakshith-403

labml_nn/transformers/LoRA/train.ipynb

@@ -0,0 +1,162 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "id": "initial_id",
+   "metadata": {
+    "collapsed": true
+   },
+   "source": "# !wget https://raw.githubusercontent.com/karpathy/char-rnn/master/data/tinyshakespeare/input.txt",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": [
+    "with open('input.txt', 'r', encoding='utf-8') as f:\n",
+    "    text = f.read()"
+   ],
+   "id": "3b1e507015ba6b81",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": [
+    "from transformers import AutoTokenizer\n",
+    "\n",
+    "tokenizer = AutoTokenizer.from_pretrained(\"gpt2\")\n",
+    "\n",
+    "tokens = tokenizer.encode(text, add_special_tokens=False)"
+   ],
+   "id": "ac8e51ae5bbfcae7",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": [
+    "context_length = 10\n",
+    "batch_size = 64"
+   ],
+   "id": "aeefcdf813e427e",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": [
+    "num_batches = len(tokens) // (batch_size * context_length)\n",
+    "tokens = tokens[:num_batches * batch_size * context_length]"
+   ],
+   "id": "a384b42274f008a2",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": [
+    "import torch\n",
+    "\n",
+    "input_ids = torch.tensor(tokens).view(-1, context_length)"
+   ],
+   "id": "5c4cc78ac1a02c1d",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": [
+    "from torch.utils.data import DataLoader, TensorDataset\n",
+    "from torch.optim import Adam\n",
+    "print(input_ids.shape)\n",
+    "dataset = TensorDataset(input_ids)\n",
+    "dataloader = DataLoader(dataset, batch_size=batch_size, shuffle=True)"
+   ],
+   "id": "7037fd75e2161382",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": [
+    "from labml_nn.transformers.LoRA.GPT2 import GPTModel\n",
+    "\n",
+    "model = GPTModel()"
+   ],
+   "id": "a98b7baa064b8494",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": [
+    "optimizer = Adam(model.parameters(), lr=5e-5)\n",
+    "criterion = torch.nn.CrossEntropyLoss()\n",
+    "\n",
+    "model.eval()\n",
+    "epochs = 3\n",
+    "for epoch in range(epochs):\n",
+    "    for batch in dataloader:\n",
+    "        inputs = batch[0]\n",
+    "        labels = inputs.clone()\n",
+    "        \n",
+    "        outputs = model(inputs)\n",
+    "        \n",
+    "        shift_logits = outputs[..., :-1, :]\n",
+    "        shift_labels = labels[..., 1:]\n",
+    "        \n",
+    "        loss = criterion(shift_logits.reshape(-1, shift_logits.size(-1)), shift_labels.reshape(-1))\n",
+    "        \n",
+    "        optimizer.zero_grad()\n",
+    "        loss.backward()\n",
+    "        optimizer.step()\n",
+    "\n",
+    "        print(f'Epoch: {epoch + 1}, Loss: {loss.item()}')\n",
+    "        break\n",
+    "\n",
+    "print(\"Training complete.\")"
+   ],
+   "id": "e2f5076894770740",
+   "outputs": [],
+   "execution_count": null
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "source": "",
+   "id": "da2d4023002648dc",
+   "outputs": [],
+   "execution_count": null
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python (ml)",
+   "language": "python",
+   "name": "ml"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}