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Questions and Answers
What is instantiation in the context of object-oriented programming?
What is instantiation in the context of object-oriented programming?
How is an object instantiated in Python when the constructor requires no parameters?
How is an object instantiated in Python when the constructor requires no parameters?
What does the term 'literal form' refer to in Python's object instantiation?
What does the term 'literal form' refer to in Python's object instantiation?
When would you use a syntax like 'Widget(a, b, c)' for instantiation?
When would you use a syntax like 'Widget(a, b, c)' for instantiation?
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How can a new instance of a list class be created indirectly in Python?
How can a new instance of a list class be created indirectly in Python?
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Which of the following is NOT mentioned as a method for creating new instances in Python?
Which of the following is NOT mentioned as a method for creating new instances in Python?
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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
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Description
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.
