Task Breakdown

1)Set Up Your Environment:

Ensure Python is installed on your machine.
You can check this by running:
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python --version
Project Structure:

Create a directory for the project named todo_app.

Inside it, create the following files:

todo.py: This will contain the main application logic.
tasks.json: This will store the tasks in JSON format.
README.md: Add documentation.
Your file structure should look like this:

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/todo_app
├── todo.py # Main application logic
├── tasks.json # File to store tasks
└── README.md # Documentation
Implement Core Features:

2)Task Class:

Define a Task class that represents individual tasks in the app. This class should handle the creation of tasks and the ability to mark them as completed:
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class Task:
def init(self, title, description, category):
self.title = title
self.description = description
self.category = category
self.completed = False

def mark_completed(self):
    self.completed = True

3)File Handling:

Use Python's json module to store tasks in a tasks.json file. This allows persistence across runs of the application.

Code to save tasks:

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import json

def save_tasks(tasks):
with open('tasks.json', 'w') as f:
json.dump([task.dict for task in tasks], f)
Code to load tasks:

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def load_tasks():
try:
with open('tasks.json', 'r') as f:
return [Task(**data) for data in json.load(f)]
except FileNotFoundError:
return []
4)User Interaction:

Implement a simple command-line interface (CLI) to interact with the user. This will include options to add a task, view tasks, mark tasks as completed, delete tasks, and exit the application.
Here's a sample implementation of the main() function:

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def main():
tasks = load_tasks()
while True:
print("1. Add Task")
print("2. View Tasks")
print("3. Mark Task Completed")
print("4. Delete Task")
print("5. Exit")

    choice = input("Choose an option: ")

    if choice == '1':
        # Add task
        title = input("Title: ")
        description = input("Description: ")
        category = input("Category: ")
        tasks.append(Task(title, description, category))
    elif choice == '2':
        # View tasks
        for idx, task in enumerate(tasks, 1):
            status = "Completed" if task.completed else "Incomplete"
            print(f"{idx}. {task.title} - {status}")
    elif choice == '3':
        # Mark task as completed
        task_num = int(input("Enter task number to mark as completed: "))
        tasks[task_num - 1].mark_completed()
    elif choice == '4':
        # Delete task
        task_num = int(input("Enter task number to delete: "))
        del tasks[task_num - 1]
    elif choice == '5':
        save_tasks(tasks)
        break

5)Testing and Documentation:

Thoroughly test your app by adding, viewing, marking, and deleting tasks.
Document the purpose of the app and how to use it in the README.md file.
README.md Example:
markdown
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To-Do App

A simple command-line To-Do list manager built with Python.

Features:

• Add tasks with titles, descriptions, and categories.
• View tasks and their completion status.
• Mark tasks as completed.
• Delete tasks.
• Save tasks to a JSON file for persistence.

Usage:

1. Run the application:

   python todo.py
   

Follow the on-screen instructions to manage your tasks.
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Start with the requested todo_app structure: todo.py, tasks.json, and README.md. Verify the Python setup with python --version, then run python todo.py while checking add, view, completion, deletion, exit, and persistence behavior. Done means the described CLI features work and the README documents the app and usage.