Constructors

Object Instantiation

Object instantiation is the process of creating an instance of a class. An instance is a specific object created from a class’s blueprint. The class defines the structure (attributes) and behavior (methods) of the object, while the instance is a concrete realization of that blueprint with its own specific data.

class Dog:
    def __init__(self, name, breed): #Constructor/initializer
        self.name = name
        self.breed = breed

    def bark(self):
        print("Woof!")

#Instantiation
my_dog = Dog("Buddy", "Golden Retriever")  #creates an instance of the Dog class
another_dog = Dog("Lucy", "Labrador")     #creates another instance


print(my_dog.name)  # Accessing attributes of the instance. Output: Buddy
my_dog.bark()       # Calling a method of the instance. Output: Woof!

print(another_dog.breed) # Output: Labrador

Classes and Objects This note should cover the fundamental concepts of classes and objects in Python, including their definitions and purposes.

Constructors (init) This note would detail the __init__ method, its role in object creation, and how to use it effectively. It would include examples of different constructor implementations.

Methods This note will explain methods in Python – how to define them within classes, how they operate on object data (using self), and different types of methods (e.g., instance methods, class methods, static methods).

Attributes This note will focus on attributes, how to define and access them within and outside of class methods. It will cover instance variables vs. class variables.

Instantiation vs. Declaration (This note compares and contrasts the creation of an instance and simply declaring a class)