tkinter.messagebox

from tkinter import *
import tkinter.messagebox

def button_pressed():
    answer = tkinter.messagebox.askyesno("Question", "Do you want to create a text file named python_hello.txt ?")
    if answer == YES:
        print("A text file called python_hello.txt has been created on your system.")
        file1 = open("python_hello.txt", 'w')
        file1.write("This is the text file you're looking for!")
    else:
        print(":(")

root = Tk()
root.title("Application")
root.geometry("500x300")

button1 = Button(root, text = "Click", fg ='red', bg ="blue", command = button_pressed)

button1.pack(side = LEFT)

root.mainloop()