LESSON 55

Python Dataclasses

Create clean, readable classes for storing structured data with less boilerplate.

Intermediate 10 min

01 · INTRODUCTION

What are dataclasses?

Python's dataclasses module helps you define data-focused classes without manually writing common methods such as __init__() and __repr__().

person.py

from dataclasses import dataclass

@dataclass
class Person:
    name: str
    age: int

person = Person("Aisha", 24)
print(person)

02 · SYNTAX

Add @dataclass above a class and declare its fields. Python generates useful methods automatically.

03 · FIELDS

Fields can have type annotations and default values. This is useful for configuration objects, records and lightweight domain models.

defaults.py

from dataclasses import dataclass

@dataclass
class Product:
    name: str
    price: float
    active: bool = True

04 · SUMMARY

Dataclasses reduce repetitive code while keeping structured data models easy to read and maintain.

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