This document discusses classes and objects in object-oriented programming. It defines a class as a blueprint or set of instructions for building objects of a specific type. An object is an instance of a class - for example, a specific bicycle would be an object of the Bicycle class. The document then demonstrates how to define a Bicycle class with attributes like color and weight, and how to create Bicycle objects by initializing them with attributes. It also discusses class methods and the relationship between classes.

1. Classes & Objects
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DOSEN:
FARIZ DARARI

2. What is a Class
A class is an entity that determines how an object will behave
and what the object will contain. In other words, it is a
blueprint or a set of instruction to build a specific type of
object.
For example in the real world, you often have many objects of
the same kind. Your bicycle is just one of many bicycles in the
world. Using object-oriented terminology, we say that your
bicycle is an instance of the class bicycles.
A class can also contain methods, which are similar to
functions

3. What is an OBJECT
Objects in OOP are the product of a Class and is an instance of that of said Class.
In the example given before, if you have a bike than your bike is an instance of
the class Bicycle. You can also set attributes for your bicycle. For example, you
can set the condition of your bicycle, set the characteristics of the bike like the
color, the weight, the material, and you can also set an attribute which signifies
that the bike is owned by you.

4. Making a Class
Class Bicycle (object):
Wheels = 2
def __init__(self, color, weight, materials):
self.color = color
self.weight = weight
self.materials = materials

5. Making an Object
We can create an object simply by calling the class with the object name
bike1 = Bicycle()
There are two ways to set an attribute the first one is using the method shown in the previous slide. You
can simply set the attribute as you are creating the object
bike1 = Bicycle(“blue”, 5, [“carbon fiber”, “titanium”]
The second way is if you want to add an attribute if the Class doesn’t have an __init__ method you can set
the attribute by writing
bike1.color = “blue”

6. Methods
Methods are simillar to function. They are both “small programs” that have parameters, perform some
operation and return a value. The difference is that methods are functions tied to a particular object.
Function:
def something(parameter):
pass
Methods:
class Myclass(object):
def something(self,parameter)
...

7. Methods

8. Class-Class Relation

9. Class-Class Relation
Output:
ROG is the best laptop on 2019
ROG has intel i7 processor
Read the comments aloud as you work
through this program to help you
understand what’s happening, then
before you run the program, see if you
can predict the expected output.

10. THANK YOU
Refrensi:
https://realpython.com/python3-object-oriented-programming/
https://www.journaldev.com/22460/python-str-repr-functions
The Practice Of Computing Using Python (3RD EDITION) by William Punch and Richard Enbody
https://github.com/ialfina/191-ddp1/tree/master/tp4-template
https://www.youtube.com/watch?v=wfcWRAxRVBA