add requirements file for bonus notebook

ch02/02_bonus_bytepair-encoder/compare-bpe-tiktoken.ipynb

@@ -1,5 +1,23 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "8a9e554f-58e3-4787-832d-d149add1b857",
+   "metadata": {},
+   "source": [
+    "- Install the additional package requirements for this bonus notebook by uncommenting and running the following cell:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d70bae22-b540-4a13-ab01-e748cb9d55c9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# pip install -r requirements-extra.txt"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "a9adc3bf-353c-411e-a471-0e92786e7103",
@@ -8,16 +26,6 @@
     "# Using BytePair encodding from `tiktoken`"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "id": "4036ffa3-0e5c-433a-a997-4ed7d33de0b2",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# !pip install tiktoken"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 2,
@@ -205,16 +213,6 @@
     "# Using the BytePair Tokenizer in HuggingFace transformers"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 12,
-   "id": "5bfff386-f725-4137-9c50-e5da0c38bea0",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# pip install transformers"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": 13,

ch02/02_bonus_bytepair-encoder/requirements-extra.txt

@@ -0,0 +1,3 @@
+requests
+tqdm
+transformers>=4.33.2