add pydantic-settings

book/cooltools/Chapter.ipynb

@@ -2440,7 +2440,19 @@
   {
    "cell_type": "markdown",
    "metadata": {},
-   "source": []
+   "source": [
+    "Is this the best way to work with environment variables?\n",
+    "\n",
+    "**pydantic-settings** makes it so easy to work with your environment variables in an easy way.\n",
+    "\n",
+    "Why it's a great tool:\n",
+    "- Type-safe configuration with zero boilerplate  \n",
+    "- Automatic environment variable loading  \n",
+    "- Built-in validation and error handling  \n",
+    "- Seamless .env file support\n",
+    "\n",
+    "For your settings, just create a class which inherits from **BaseSettings** and define your variables there."
+   ]
   },
   {
    "cell_type": "code",