Update classes note

Author: amgadmadkour

docs/python/language/classes.ipynb

@@ -26,9 +26,43 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 10,
    "id": "bdd215a1",
    "metadata": {},
+   "outputs": [],
+   "source": [
+    "class Car:\n",
+    "    def __init__(self, make, model, year):\n",
+    "        self.make = make\n",
+    "        self.model = model\n",
+    "        self.year = year\n",
+    "    \n",
+    "    def display(self):\n",
+    "        print(f\" {self.year} {self.make} {self.model}\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "a9c324ce",
+   "metadata": {},
+   "source": [
+    "* **__init__()** : is the instance initializer that runs automatically after a new object is created typically used to set up initial state (attributes) for that instance.\n",
+    "* **self** :  is the reference to the current object, passed as the first parameter to instance methods so you can access and modify the object attributes and call its other methods."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e84a14c4",
+   "metadata": {},
+   "source": [
+    "## Declaring an instance of a class"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "id": "25852529",
+   "metadata": {},
    "outputs": [
     {
      "name": "stdout",
@@ -40,29 +74,49 @@
     }
    ],
    "source": [
-    "class Car:\n",
+    "car = Car(\"Volvo\", \"XC90\", \"2023\")\n",
+    "car.display()\n",
+    "car.model = \"XC60\"\n",
+    "car.display()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "967aba95",
+   "metadata": {},
+   "source": [
+    "## Inheritence"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "6ed40d08",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      " 2023 Rivian R1S\n"
+     ]
+    }
+   ],
+   "source": [
+    "class ElectricCar(Car):\n",
     "    def __init__(self, make, model, year):\n",
-    "        self.make = make\n",
-    "        self.model = model\n",
-    "        self.year = year\n",
-    "    \n",
-    "    def display(self):\n",
-    "        print(f\" {self.year} {self.make} {self.model}\")\n",
+    "        super().__init__(make, model, year)\n",
     "\n",
-    "if __name__ == '__main__':\n",
-    "    car = Car(\"Volvo\", \"XC90\", \"2023\")\n",
-    "    car.display()\n",
-    "    car.model = \"XC60\"\n",
-    "    car.display()"
+    "car = ElectricCar(\"Rivian\", \"R1S\", \"2023\")\n",
+    "car.display()"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "a9c324ce",
+   "id": "2e3e1c50",
    "metadata": {},
    "source": [
-    "* **__init__()** : is the instance initializer that runs automatically after a new object is created typically used to set up initial state (attributes) for that instance.\n",
-    "* **self** :  is the reference to the current object, passed as the first parameter to instance methods so you can access and modify the object attributes and call its other methods."
+    "* **super()**: is a built-in function in Python that provides access to methods in a parent or superclass from a child class. It's commonly used in inheritance to call methods from the parent class, especially in the __init__ method."
    ]
   }
  ],