Add PyPI package (#576)

* Add PyPI package

* fixes

* fixes

ch05/01_main-chapter-code/ch05.ipynb

@@ -147,6 +147,11 @@
    "source": [
     "import torch\n",
     "from previous_chapters import GPTModel\n",
+    "# If the `previous_chapters.py` file is not available locally,\n",
+    "# you can import it from the `llms-from-scratch` PyPI package.\n",
+    "# For details, see: https://github.com/rasbt/LLMs-from-scratch/tree/main/pkg\n",
+    "# E.g.,\n",
+    "# from llms_from_scratch.ch04 import GPTModel\n",
     "\n",
     "GPT_CONFIG_124M = {\n",
     "    \"vocab_size\": 50257,   # Vocabulary size\n",
@@ -212,6 +217,9 @@
     "import tiktoken\n",
     "from previous_chapters import generate_text_simple\n",
     "\n",
+    "# Alternatively:\n",
+    "# from llms_from_scratch.ch04 import generate_text_simple\n",
+    "\n",
     "def text_to_token_ids(text, tokenizer):\n",
     "    encoded = tokenizer.encode(text, allowed_special={'<|endoftext|>'})\n",
     "    encoded_tensor = torch.tensor(encoded).unsqueeze(0) # add batch dimension\n",
@@ -924,6 +932,8 @@
    "outputs": [],
    "source": [
     "from previous_chapters import create_dataloader_v1\n",
+    "# Alternatively:\n",
+    "# from llms_from_scratch.ch02 import create_dataloader_v1\n",
     "\n",
     "# Train/validation ratio\n",
     "train_ratio = 0.90\n",
@@ -2548,7 +2558,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.8"
+   "version": "3.10.16"
   }
  },
  "nbformat": 4,