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Python OOP: Objects and Class

In Python, objects and classes are fundamental concepts of object-oriented programming (OOP). Object-oriented programming allows you to create objects with their own attributes and methods, making code organization clear and maintainable.

 

Defining a Class in Python

  • To define a new class, use the class keyword, followed by the name of the class (usually starting with an uppercase letter).
  • Inside the class, you can define attributes (variables) and methods (functions) that objects of the class will have.

 

Creating Objects from a Class

  • To create an object from a class, use the syntax class_name().
  • This will initialize a new object based on the defined class.

 

Example: Here's a simple example of how to define a class and create objects from it:

# Define the class Person
class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def say_hello(self):
        print(f"Hello, my name is {self.name} and I am {self.age} years old.")

# Create objects (instances) from the class Person
person1 = Person("John", 30)
person2 = Person("Alice", 25)

# Call the say_hello method from the objects
person1.say_hello()   # Output: Hello, my name is John and I am 30 years old.
person2.say_hello()   # Output: Hello, my name is Alice and I am 25 years old.

In the example above, we defined the Person class with two attributes name and age, along with a method say_hello(). Then, we created two objects person1 and person2 from the Person class and called the say_hello() method of each object to display their information.