05. Object Oriented Programming/5.2 Class Object Attributes and Methods.ipynb

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  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Class Object Attributes and Methods"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### Class Object Attributes"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Dog():\n",
    "    \n",
    "    # Class object attribute\n",
    "    # Same for any instance of a class\n",
    "    species = 'mammal' # don't need to use the self keyword as will be true regardless of the instance\n",
    "    \n",
    "    def  __init__(self, breed, name, spots):\n",
    "        self.breed = breed\n",
    "        self.name = name\n",
    "        \n",
    "        # Expect boolean True/False\n",
    "        self.spots = spots"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "my_dog = Dog(breed='Lab', name='Sam', spots='False')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "__main__.Dog"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "type(my_dog)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'mammal'"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "my_dog.species"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### Methods\n",
    "A method is a function inside the Class, that will work with the object in some way"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Dog():\n",
    "    \n",
    "    # Class object attribute\n",
    "    # Same for any instance of a class\n",
    "    species = 'mammal' # don't need to use the self keyword as will be true regardless of the instance\n",
    "    \n",
    "    def  __init__(self, breed, name):\n",
    "        self.breed = breed\n",
    "        self.name = name\n",
    "    \n",
    "    # Operations/Actions ----> Methods\n",
    "    def bark(self):\n",
    "        print('WOOF! My name is {}'.format(self.name))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {},
   "outputs": [],
   "source": [
    "my_dog = Dog('Lab','Frankie')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "__main__.Dog"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "type(my_dog)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'mammal'"
      ]
     },
     "execution_count": 21,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "my_dog.species"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Frankie'"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "my_dog.name"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "WOOF! My name is Frankie\n"
     ]
    }
   ],
   "source": [
    "my_dog.bark()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Dog():\n",
    "    \n",
    "    # Class object attribute\n",
    "    # Same for any instance of a class\n",
    "    species = 'mammal' # don't need to use the self keyword as will be true regardless of the instance\n",
    "    \n",
    "    def  __init__(self, breed, name):\n",
    "        self.breed = breed\n",
    "        self.name = name\n",
    "    \n",
    "    # Operations/Actions ----> Methods\n",
    "    def bark(self, number):\n",
    "        print('WOOF! My name is {} and the number is {}'.format(self.name, number))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [],
   "source": [
    "my_dog = Dog('Lab','Frankie')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "WOOF! My name is Frankie and the number is 10\n"
     ]
    }
   ],
   "source": [
    "my_dog.bark(10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Circle():\n",
    "    # Class object attribute\n",
    "    pi = 3.14\n",
    "    \n",
    "    def __init__(self, radius=1): # radius has a default value of 1\n",
    "        self.radius = radius\n",
    "    \n",
    "    # Method\n",
    "    def get_circumference(self):\n",
    "        return self.radius * self.pi * 2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [],
   "source": [
    "my_circle = Circle()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3.14"
      ]
     },
     "execution_count": 29,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "my_circle.pi"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1"
      ]
     },
     "execution_count": 30,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "my_circle.radius"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [],
   "source": [
    "my_circle = Circle(30)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "30"
      ]
     },
     "execution_count": 32,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "my_circle.radius"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "188.4"
      ]
     },
     "execution_count": 33,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "my_circle.get_circumference()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Circle():\n",
    "    # Class object attribute\n",
    "    pi = 3.14\n",
    "    \n",
    "    def __init__(self, radius=1): # radius has a default value of 1\n",
    "        self.radius = radius\n",
    "        self.aera = radius * radius * Circle.pi # pi can be references as either self.pi or Circle.pi\n",
    "    # Method\n",
    "    def get_circumference(self):\n",
    "        return self.radius * self.pi * 2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "metadata": {},
   "outputs": [],
   "source": [
    "my_circle = Circle(30)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2826.0"
      ]
     },
     "execution_count": 36,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "my_circle.aera"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
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