📝 Python Todo Manager

A command-line Todo Manager built with Python using Object-Oriented Programming (OOP), modules, and JSON file storage.

The application allows users to add, view, complete, and delete tasks. Tasks are stored in a JSON file so they remain available after restarting the program.

🚀 Features

• ➕ Add tasks
• 👀 View all tasks
• ✅ Mark tasks as completed
• 🗑️ Delete tasks
• 💾 Save tasks to JSON
• 🔄 Load tasks when the program starts
• 🛡️ Handle invalid input
• 🚫 Prevent empty tasks
• 🖥️ Menu-driven command-line interface

🛠️ Technologies Used

• Python 3
• JSON
• File Handling
• Object-Oriented Programming
• Python Modules

📚 Concepts Practiced

This project helped practice:

• Classes and Objects
• __init__()
• self
• Methods
• Modules
• import
• Lists
• Dictionaries
• Boolean values
• append()
• pop()
• enumerate()
• while loops
• for loops
• try/except
• ValueError
• File handling
• JSON serialization and deserialization
• os.path.exists()

📂 Project Structure

python-todo-manager/
├── main.py
├── todo.py
├── tasks.json
└── README.md

🧠 Project Structure

The project separates the application into two Python files.

main.py
   ↓
imports TodoManager
   ↓
todo.py
   ↓
TodoManager
   ↓
tasks.json

todo.py contains the TodoManager class and task-related functionality.

main.py contains the user interface and menu.

▶️ How to Run

Make sure Python 3 is installed.

Run:

python main.py

💻 Menu

==============================
📝 TODO MANAGER
==============================
1. Add Task
2. View Tasks
3. Complete Task
4. Delete Task
5. Exit

💾 Data Storage

Tasks are stored in tasks.json.

Example:

[
    {
        "task": "Complete Python project",
        "completed": true
    },
    {
        "task": "Practice DSA",
        "completed": false
    }
]

The application automatically saves changes when tasks are added, completed, or deleted.

🔮 Future Improvements

• Edit tasks
• Add task deadlines
• Add task priorities
• Add categories
• Search tasks
• Filter completed and pending tasks
• Add dates and timestamps
• Create a graphical user interface
• Database integration

👨‍💻 Author

Ayushman Tiwari

GitHub: https://github.com/ayushman-ece