Quick Python: Dataclasses

Brandon Rozek

April 8, 2020

Python 3.7 and above have a feature called dataclasses. This allows us to reduce boilerplate code by removing the need to create a whole constructor and providing a sensible __repr__ function.

from dataclasses import dataclass

@dataclass
class Person:
    name: str
    age: int = 0

Usage:

p = Person("Bob", 30)
print(p)
Person(name='Bob', age=20)

To make an attribute have a default value, add it after the type declaration like I have with age.