The Change a Field block

Change part of an object · in code: Object Fields

What it does

Changes one field (one named part) of an object, like a pet's energy.

Use it for

Feeding a pet: pet.energy = pet.energy + 2.
Inside a method, changing the object's own field: this.energy = this.energy - 1.

What to fill in

Which object: A value holding an object: pet, pets[1], or this inside a method.
Which field: The field's name, like energy. It must be one the object already has.
New value: Anything, using the old value if you like: pet.energy + 2.

Try it

Open it in the editor, press Run, then change it and run it again.

Example · ObjectsMy PetOne object holds a pet's name and energy. Feed it with Change a Field.

Try it

1from types import SimpleNamespace2
3pet = SimpleNamespace(name="Tom", kind="cat", energy=3)4print("Meet " + pet.name + " the " + pet.kind + ", with energy " + str(pet.energy))5snacks = int(input("How many snacks? "))6for _ in range(snacks):7    pet.energy = pet.energy + 28print(pet.name + " now has energy " + str(pet.energy) + " ⚡")

Tips

Make an object with curly brackets: pet = {name: "Tom", energy: 3}, or from a class: pet = Pet("Tom").
Every name for the same object sees the change: after friend = pet, changing friend.energy changes pet.energy too.
To show an object, show one field at a time: pet.name + " has " + pet.energy.

See it in use

Examples with the Change a Field block

Learn it in lesson 9Objects and classes

Goes with

Class