Scoop

As explained in Python Workout: 50 ten-minute exercises

Scoop is a book-specific Python object type representing an individual scoop that can be placed in a Bowl.

Model one ice-cream scoop as a Python object with a single flavor attribute. Define Scoop as a class, then create instances by passing each flavor to Scoop(). section 9.1 section 9.2

Implement Scoop by following these steps:

• Define the class with the class keyword. section 9.2
• Use __init__(self, flavor) to assign self.flavor = flavor on each new instance. section 9.2
• Create multiple Scoop objects and store them in a list, preserving each object's flavor attribute. section 9.1 section 9.7
• Use self as the conventional first method parameter; Python does not reserve that name, but developers and tools expect it. section 9.2

Create and collect scoops

class Scoop: def __init__(self, flavor): self.flavor = flavor scoops = [Scoop(flavor) for flavor in ('chocolate', 'vanilla', 'persimmon')] for scoop in scoops: print(scoop.flavor) section 9.1 section 9.2

Figure 9.1 Three instances of Scoop, each referring to its class

Visualize three Scoop instances and their relationship to the Scoop class. section 9.1

How Python Workout: 50 ten-minute exercises covers it

How deep it goes

Explains class creation, initialization, self, attributes, and list storage, while deferring strict type enforcement.

Examples

Uses chocolate, vanilla, and persimmon scoops collected in a list and later stored in a Bowl.

What it assumes

Assumes familiarity with Python functions while teaching classes, instances, attributes, and self through the implementation.

What you can do after

Build it from scratch by defining Scoop, creating flavored instances, collecting them, and reading their attributes.

How it connects

Connects classes, objects, instances, attributes, __init__, lists, and Bowl.

liveBookmanning.com

Read Python Workout: 50 ten-minute exercises on liveBook Get the book at manning.com

Related concepts

• classkind of · A class is a programming-language construct that defines a type’s structure or behavior and provides a basis for creating or representing objects.
• attributeuses · An attribute is a named property, value, or piece of information associated with an entity, object, or program element.
• constructor methodconfigured by · A constructor is a type-associated operation or callable that creates or initializes an instance and establishes its initial state.

This explainer was generated by Manning's knowledge graph from the text of Python Workout: 50 ten-minute exercises. The section links point to the parts of the book it draws on.