Lesson 16 — Dataclasses

Clean data objects

@dataclass writes the boring parts of a class for you. You list the fields with type annotations (name: str), and Python generates init and a readable repr from them. Fields are filled in the order you declare them.

from dataclasses import dataclass
@dataclass
class Point:
    x: int
    y: int
print(Point(1, 2))  # Point(x=1, y=2)

Why it matters: most programs pass around simple records, and dataclasses make them short and easy to debug.