Untitled

import tkinter as tk
from tkinter import messagebox

class TaskApp:
    def __init__(self, master):
        self.master = master
        master.title("Task Manager")

        self.tasks = []

        self.label = tk.Label(master, text="Task Manager")
        self.label.pack()

        self.task_entry = tk.Entry(master)
        self.task_entry.pack()

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

        self.task_listbox = tk.Listbox(master)
        self.task_listbox.pack()

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

        self.complete_button = tk.Button(master, text="Mark as Complete", command=self.complete_task)
        self.complete_button.pack()

    def add_task(self):
        task = self.task_entry.get()
        if task:
            self.tasks.append(task)
            self.task_listbox.insert(tk.END, task)
            self.task_entry.delete(0, tk.END)

    def delete_task(self):
        selection = self.task_listbox.curselection()
        if selection:
            index = selection[0]
            del self.tasks[index]
            self.task_listbox.delete(index)

    def complete_task(self):
        selection = self.task_listbox.curselection()
        if selection:
            index = selection[0]
            task = self.tasks[index]
            messagebox.showinfo("Task Completed", f"Task '{task}' marked as complete!")
            self.task_listbox.itemconfig(index, {'bg':'gray'})
            self.task_listbox.selection_clear(index)

def main():
    root = tk.Tk()
    app = TaskApp(root)
    root.mainloop()

if __name__ == "__main__":
    main()