Dataclass Default Values

from dataclasses import dataclass


@dataclass
class Part:
    name: str
    subsystem: str
    mass: float
    is_reusable: bool = False


print(Part("fairing", "structure", 900.0))
print(Part("booster", "propulsion", 25000.0, is_reusable=True))

Part(name='fairing', subsystem='structure', mass=900.0, is_reusable=False)
Part(name='booster', subsystem='propulsion', mass=25000.0, is_reusable=True)