Add enum

book/pythontricks/Chapter.ipynb

@@ -984,6 +984,51 @@
     "    def push(self, item: T) -> None:\n",
     "        self.items.append(item)"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Enumerations in Python"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To make your Python Code cleaner, use `Enums`.\n",
+    "\n",
+    "`Enums` (or enumerations) are a way to represent a set of named values as symbolic names.\n",
+    "\n",
+    "It provides a way to work with meaningful names instead of raw integers or weird string constants.\n",
+    "\n",
+    "Python supports enums with its standard library."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Option 1\n",
+    "from enum import Enum, auto\n",
+    "\n",
+    "class Color(Enum):\n",
+    "    RED = 1\n",
+    "    GREEN = 2\n",
+    "    BLUE = 3\n",
+    "    \n",
+    "print(Color.RED.value)  # Output: 1\n",
+    "\n",
+    "# Option 2: auto() assigns unique values starting by 1\n",
+    "class Status(Enum):\n",
+    "    PENDING = auto()\n",
+    "    APPROVED = auto()\n",
+    "    REJECTED = auto()\n",
+    "    \n",
+    "print(Status.PENDING.value) # Output: 2"
+   ]
   }
  ],
  "metadata": {