6 Questions
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()or10for 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, andc
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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