Delux_pro - Droid

🔹 Introduction

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The To-Do List App is one of the most popular beginner projects. It teaches you how to:

Create a GUI with Tkinter.
Use Listbox to display tasks.
Add, delete, and mark tasks as done.
Save tasks to a file so they persist after closing the app.

🔹 Code Example

import tkinter as tk
from tkinter import messagebox

# ------------------------------
# Functions
# ------------------------------

def add_task():
    task = task_entry.get()
    if task != "":
        tasks_listbox.insert(tk.END, task)
        task_entry.delete(0, tk.END)
    else:
        messagebox.showwarning("Warning", "Please enter a task!")

def delete_task():
    try:
        selected_task = tasks_listbox.curselection()[0]
        tasks_listbox.delete(selected_task)
    except:
        messagebox.showwarning("Warning", "Please select a task to delete!")

def save_tasks():
    tasks = tasks_listbox.get(0, tk.END)
    with open("tasks.txt", "w") as f:
        for task in tasks:
            f.write(task + "\n")
    messagebox.showinfo("Saved", "Tasks saved successfully!")

def load_tasks():
    try:
        with open("tasks.txt", "r") as f:
            for task in f:
                tasks_listbox.insert(tk.END, task.strip())
    except FileNotFoundError:
        pass

# ------------------------------
# GUI Setup
# ------------------------------

root = tk.Tk()
root.title("📝 To-Do List App")
root.geometry("400x500")

# Task entry
task_entry = tk.Entry(root, width=30, font=("Arial", 12))
task_entry.pack(pady=10)

# Add button
add_button = tk.Button(root, text="➕ Add Task", width=20, command=add_task)
add_button.pack(pady=5)

# Listbox
tasks_listbox = tk.Listbox(root, width=40, height=15, font=("Arial", 12))
tasks_listbox.pack(pady=10)

# Buttons
delete_button = tk.Button(root, text="❌ Delete Task", width=20, command=delete_task)
delete_button.pack(pady=5)

save_button = tk.Button(root, text="💾 Save Tasks", width=20, command=save_tasks)
save_button.pack(pady=5)

# Load tasks at startup
load_tasks()

root.mainloop()

🔹 Features of This App

Add Task ➝ Write in the input box and click Add Task.
Delete Task ➝ Select a task in the list and click Delete Task.
Save Tasks ➝ Saves all tasks into a file (tasks.txt).
Auto Load ➝ When you restart the app, it automatically loads tasks from tasks.txt.

🔹 Example Run

User types “Study Python”, clicks Add Task → Task appears in the list.
User selects the task “Study Python”, clicks Delete Task → Task removed.
User clicks Save Tasks → All tasks saved to file.