Building a To-Do List Application in Python with Tkinter

In this tutorial, we will be building a simple To-Do List application using Python and Tkinter. Tkinter is a standard GUI library for Python that allows you to create desktop applications with ease.

Step 1: Setting up the project

First, make sure you have Python installed on your system. You can download Python from the official website: https://www.python.org/

Next, create a new Python file for your To-Do List application. You can name it todo_list.py.

Step 2: Importing the necessary libraries

Import the Tkinter library and other necessary libraries for the application.

import tkinter as tk
from tkinter import messagebox

Step 3: Creating the main window

Create the main window for the application and set its title.

root = tk.Tk()
root.title("To-Do List")

Step 4: Adding a text widget for tasks

Add a text widget to the main window where users can input their tasks.

task_entry = tk.Text(root, height=5, width=50)
task_entry.pack()

Step 5: Adding buttons for adding and deleting tasks

Add buttons for adding tasks and deleting tasks from the To-Do list.

def add_task():
    task = task_entry.get("1.0", tk.END).strip()
    if task:
        task_list.insert(tk.END, task)
        task_entry.delete("1.0", tk.END)
    else:
        messagebox.showerror("Error", "Please enter a task")

add_button = tk.Button(root, text="Add Task", command=add_task)
add_button.pack()

def delete_task():
    task_index = task_list.curselection()
    if task_index:
        task_list.delete(task_index)

delete_button = tk.Button(root, text="Delete Task", command=delete_task)
delete_button.pack()

Step 6: Creating a list to store tasks

Create a list to store the tasks added by the user.

task_list = tk.Listbox(root, height=15, width=50)
task_list.pack()

Step 7: Running the application

Finally, run the application by starting the main event loop.

root.mainloop()

That’s it! You have successfully built a To-Do List application in Python with Tkinter. You can customize the application further by adding more features such as saving tasks to a file, setting deadlines for tasks, etc. Have fun coding!