TO DO list project using Python Tkinter

2 min readDec 14, 2023

Here is another program with Python Tkinter, the TODO list application. In this application user can create new tasks, remove the existing tasks and mark the tasks as done when the task is completed. If you are a beginner in python or tkinter, you can check my tutorials(links will be at the end of this page). For more projects in tkinter, you can check my previous posts.

import tkinter as tk
from tkinter import messagebox

class TodoListApp:
    def __init__(self, root):
        self.root = root
        self.root.title("To-Do List App")
        self.root.geometry("500x400")
        self.root.config(bg="#3498db")  
        self.tasks = []

        self.task_entry = tk.Entry(root, width=30, font=('Arial', 14))
        self.task_entry.grid(row=0, column=0, padx=10, pady=10)

        add_button = tk.Button(root, text="Add Task", command=self.add_task, font=('Arial', 12), bg="#2ecc71", fg="#ecf0f1")  # Set button colors
        add_button.grid(row=0, column=1, padx=10, pady=10)

        self.task_listbox = tk.Listbox(root, width=40, height=10, font=('Arial', 12), bg="#ecf0f1", fg="#2c3e50", selectbackground="#3498db")  # Set listbox colors
        self.task_listbox.grid(row=1, column=0, columnspan=2, padx=10, pady=10)

        remove_button = tk.Button(root, text="Remove Task", command=self.remove_task, font=('Arial', 12), bg="#e74c3c", fg="#ecf0f1")  # Set button colors
        remove_button.grid(row=2, column=0, padx=10, pady=10, sticky="ew")

        complete_button = tk.Button(root, text="Complete Task", command=self.complete_task, font=('Arial', 12), bg="#f39c12", fg="#ecf0f1")  # Set button colors
        complete_button.grid(row=2, column=1, padx=10, pady=10, sticky="ew")

        self.task_listbox.bind('<Double-Button-1>', lambda event: self.complete_task())

    def add_task(self):
        task = self.task_entry.get()
        if task:
            self.tasks.append(task)
            self.update_task_list()
            self.task_entry.delete(0, tk.END)
        else:
            messagebox.showwarning("Warning", "Please enter a task.")

    def remove_task(self):
        selected_task_index = self.task_listbox.curselection()
        if selected_task_index:
            self.tasks.pop(selected_task_index[0])
            self.update_task_list()

    def complete_task(self):
        selected_task_index = self.task_listbox.curselection()
        if selected_task_index:
            completed_task = self.tasks.pop(selected_task_index[0])
            completed_task = f"[Done] {completed_task}"
            self.tasks.append(completed_task)
            self.update_task_list()

    def update_task_list(self):
        self.task_listbox.delete(0, tk.END)
        for task in self.tasks:
            self.task_listbox.insert(tk.END, task)

if __name__ == "__main__":
    root = tk.Tk()
    app = TodoListApp(root)
    root.mainloop()

You can Check my previous post here:

Happy coding!!!!

TO DO list project using Python Tkinter

Written by Nishitha Kalathil