Task model

Design the Task class.

Project: Todo CLI

In this project you will build a Todo CLI (to-do app) step by step. Create a task list, add tasks, list them and complete them.

First we design the data model. In the simplest form we can store tasks in a list. Each task is a string title.

Each lesson in the project builds on the previous one's solution; so the code grows piece by piece. This approach is close to how real-world projects work.

An empty task list

As the data model we use an empty list:

tasks = []
print(tasks)   # []

This list is the heart of our app. Tasks will be added here, listed from here and completed here. All functions share this list.

We start simple and grow the project step by step; this is a good software development method.

Exercise Print the empty list

Assign an empty list to tasks. Then print it with print(tasks).

Show example solution

tasks = []
print(tasks)

Test yourself

What does the Todo CLI need first?
- A graphical interface
- A task list (tasks)
- A database
- A server
Show answer

A task list (tasks) — First we need a list to hold the tasks.

Complete the empty list

tasks = ____
print(tasks)

Show answer

tasks = []
print(tasks)

Match the Todo CLI steps

tasks = []

Empty list
print(tasks)

Print
add_task

Add task
list_tasks

List tasks

Next lesson: Adding tasks

We Are Enhancing Your Experience

Cookie Preferences

Strictly Necessary Cookies

Analytical Cookies