update classes, objects and singleton

Author: rambasnet

notebooks/ClassesObjects-Singleton.ipynb

@@ -872,10 +872,18 @@
    "id": "0bc19c94",
    "metadata": {},
    "source": [
-    "## Types of Class Methods\n",
+    "## Types of Class members\n",
+    "\n",
+    "- Methods and properties are the two main types of class members\n",
+    "\n",
+    "## Types of Class Properties and Methods\n",
+    "\n",
+    "### Class Properties\n",
+    "- class variables that are shared across all the instances of a class\n",
+    "- attached to the class itself and not to any instance\n",
+    "- accessed via class name or instance name\n",
+    "- see example below\n",
     "\n",
-    "- functions are normally called methods within a class\n",
-    "- see this resource: https://realpython.com/instance-class-and-static-methods-demystified/\n",
     "\n",
     "### Instance Properties\n",
     "\n",
@@ -886,6 +894,9 @@
     "- used as attribues/variables\n",
     "- see example above\n",
     "\n",
+    "- functions are normally called methods within a class\n",
+    "- see this resource: https://realpython.com/instance-class-and-static-methods-demystified/\n",
+    "\n",
     "### Instance Methods\n",
     "    \n",
     "- regular *instance method*\n",
@@ -913,7 +924,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 7,
    "id": "e4a91bd1",
    "metadata": {},
    "outputs": [],
@@ -944,32 +955,65 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 6,
    "id": "132ecac5",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "('instance method called', <__main__.MyClass at 0x1085c30a0>, 105)"
+      ]
+     },
+     "execution_count": 6,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "instance = MyClass()\n",
     "instance.set_method(2, 3)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "id": "aeca739a",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "('class method called', __main__.MyClass, 18)"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "# call class method\n",
     "MyClass.classmethod(3, 5)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 4,
    "id": "961ace48",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "('static method called', 18)"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "# call static method\n",
     "MyClass.staticmethod(3, 5)"