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Building Robust Object-Oriented Python Applications and Libraries

Solution: Build a To-Do Application

Explore how to build a fully functional To-Do application in Python by implementing Task and ToDoList modules. Learn to manage tasks with attributes and methods for adding, updating, and deleting, and integrate a user interface to display and interact with task data. This lesson strengthens your understanding of object-oriented design and practical coding in Python.

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You must have implemented the various approaches to develop a solution to the challenge given in the previous lesson. Let’s discuss how we can build a complete coded solution for the given To-Do application step by step:

The Task module

First, create a Task module incorporating the task’s ID (t_id), task description, task state, and functionalities to change the task’s description and state.

Let’s have a look at the code below:

Python 3.10.4
class Task:
    # Initialize the object's attributes
    def __init__(self, t_id: int, description: str, state: str = "incomplete"):
        self.t_id = t_id
        self.description = description
        self.state = state
    # Modify the task's description
    def change_description(self, description: str) -> None:
        self.description = description
    # Modify the task's state
    def change_state(self, state: str) -> None:
        self.state = state
    
    def __repr__(self) -> str:
        return f"Task ID: {self.t_id} | Description: {self.description} | State: {self.state}"

Code explanation

Here’s the explanation of the code given above:

  • Line ...