W5: Instance methods and small exercise

Author: tomasff

week5/w5.ipynb

@@ -215,7 +215,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -249,7 +249,68 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "**[INSERT diagram for class vs object]**"
+    "We can also define other \"behaviors\" for each instance of `Person`.\n",
+    "Let's define an instance method called `introduce` which introduces a new person.\n",
+    "This is done using the same syntax used to define `__init__`. Again, we must take `self` as the first parameter.\n",
+    "\n",
+    "We form a new string which contains the person's name, age, and profession using the same syntax introduced before and print it.\n",
+    "\n",
+    "We can then invoke `introduce` by using the `.` syntax and the syntax we used to invoke \"normal\" functions.\n",
+    "Note that, while `self` is a required parameter for `introduce`, we don't need to explictly pass it to `introduce`."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "class Person:\n",
+    "    def __init__(self, name, age, profession):\n",
+    "        self.name = name\n",
+    "        self.age = age\n",
+    "        self.profession = profession\n",
+    "\n",
+    "    def introduce(self):\n",
+    "        print(f\"I'm {self.name}, {self.age} years old. I'm a {self.profession}.\")\n",
+    "\n",
+    "my_person = Person(\"tomas\", 20, \"computer scientist\")\n",
+    "my_person.introduce()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "> Task 1: Complete the `eat` method which will allow instances of `Person` to eat.\n",
+    "\n",
+    "`eat` should take the food name as a parameter and return \"\\<Name of the person\\> is eating \\<name of the food\\>\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "class Person:\n",
+    "    def __init__(self, name, age, profession):\n",
+    "        self.name = name\n",
+    "        self.age = age\n",
+    "        self.profession = profession\n",
+    "\n",
+    "    def introduce(self):\n",
+    "        print(f\"I'm {self.name}, {self.age} years old. I'm a {self.profession}.\")\n",
+    "    \n",
+    "    def eat(self, food):\n",
+    "        return \"\"\n",
+    "\n",
+    "my_person = Person(\"tomas\", 20, \"computer scientist\")\n",
+    "my_person.introduce()\n",
+    "\n",
+    "\n",
+    "# DO NOT MODIFY\n",
+    "assert my_person.eat(\"pasta\") == \"tomas is eating pasta\", \"Test failed: Something went wrong, expected 'tomas is eating pasta'\""
    ]
   },
   {
@@ -287,6 +348,13 @@
     "tomas.describe()"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "**[INSERT diagram for class vs object]**"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},