Python Coding challenge - Day 704| What is the output of the following Python Code?

 

Code Explanation:

1) from dataclasses import dataclass

Imports the dataclass decorator from Python’s dataclasses module (introduced in Python 3.7).

@dataclass automatically generates methods like:

__init__ (constructor)

__repr__ (string representation)

__eq__ (equality checking)

and more (depending on arguments).

2) @dataclass

This decorator is applied to the class Point.

It tells Python: “Automatically create common methods for me, based on class attributes.”

3) class Point:

Defines a class called Point.

4) x: int

Declares a field x of type int.

No default value is given → it’s required when creating an instance.

5) y: int = 0

Declares another field y of type int.

Has a default value 0 → optional when creating an instance.

6) p1 = Point(5)

Creates an instance of Point.

Since only one argument is given (5), it fills x = 5.

y is not provided, so it takes the default y = 0.

Equivalent to:

p1 = Point(x=5, y=0)

7) print(p1)

Prints the instance p1.

Because of @dataclass, Python automatically generated a __repr__ method.

This representation includes the class name and field values in the form:

Point(x=5, y=0)

Final Output

Point(x=5, y=0)

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