Creating a dataclass

Dataclasses can provide even richer ways of storing and working with data. Previously we used a namedtuple on weight log entries to make a nice easy to use data structure. In this code, we're going to use a dataclass to do the same thing, but add a custom property to return the body mass to flipper length ratio. Dataclasses start with a collection of fields and their types. Then you define any properties, which are functions on the dataclass that operate on itself to return additional information about the data. For example, a person dataclass might have a property that calculates someone's current age based on their birthday and the current date.

Questo esercizio fa parte del corso

Data Types in Python

Visualizza il corso

Istruzioni dell'esercizio

Import dataclass from dataclasses.
Add the species (string), sex (string), body_mass (int), and flipper_length (int) fields to the dataclass.
Add a property (mass_to_flipper_length_ratio) that returns the body_mass divided by the flipper_length.

Esercizio pratico interattivo

Prova a risolvere questo esercizio completando il codice di esempio.

# Import dataclass
from ____ import ____

@____
class WeightEntry:
    # Define the fields on the class
    ____: str
    ____: int
    ____: int
    ____: str
        
    # Define a property that returns the body_mass / flipper_length
    ____
    ____ mass_to_flipper_length_ratio(____):
        return ____.body_mass / ____.____

Modifica ed esegui il codice