Instantiation in Object-Oriented Programming

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What is instantiation in the context of object-oriented programming?

Creating a new instance of a class

How is an object instantiated in Python when the constructor requires no parameters?

w = Widget()

What does the term 'literal form' refer to in Python's object instantiation?

Designating new instances directly

When would you use a syntax like 'Widget(a, b, c)' for instantiation?

To create a new instance with specific parameters

How can a new instance of a list class be created indirectly in Python?

Call the sorted function

Which of the following is NOT mentioned as a method for creating new instances in Python?

Calling the 'destroy' function

Study Notes

Instantiation in Object-Oriented Programming

  • Instantiation in OOP creates an object from a class, where the object is an instance of the class

Object Instantiation in Python

  • In Python, an object is instantiated by calling the class as a function and passing in any required arguments
  • If the constructor requires no parameters, an object is instantiated by calling the class without arguments, e.g., MyClass()

Literal Form in Python

  • In Python, literal form refers to the direct creation of an object, e.g., list() or 10 for an integer
  • Literal form is a concise way to create objects in Python

Syntax for Instantiation

  • The syntax Widget(a, b, c) is used for instantiation when the class constructor requires arguments, e.g., a, b, and c

Creating a List Instance in Python

  • A new instance of a list class can be created indirectly in Python by using the list() function or by using the literal form, e.g., []

Methods for Creating New Instances in Python

  • The following are methods for creating new instances in Python: literal form, direct creation using the list() function, and calling the class as a function
  • Using __new__ method is NOT mentioned as a method for creating new instances in Python

Learn about the process of creating a new instance of a class through instantiation in object-oriented programming. Understand the syntax for instantiating an object by invoking the constructor of a class with or without parameters.

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