Explain the concept and use of dataclasses in Python.

Dataclasses in Python are a convenient way to create classes primarily intended for storing data, without the need to write a lot of boilerplate code.

Main features of dataclasses:

• Automatically generate methods like __init__, __repr__, __eq__, and others.
• Easily define fields with types.
• Support default values and value factories.

Example usage:

from dataclasses import dataclass

@dataclass
class Point:
    x: int
    y: int

p1 = Point(10, 20)
print(p1)  # Point(x=10, y=20)

This simplifies creating simple classes for data storage, making the code cleaner and easier to maintain.