import Tkinter as tk
window = tk.Tk()
def checkPassword():
    password = "Martenelo"
    enteredPassword = passwordEntry.get()
    if password == enteredPassword:
        confirmLabel.config(text="This piece of code was written by JMR")
    else:
        confirmLabel.config(text="Incorrect")
passwordLabel = tk.Label(window, text="Password:")
passwordEntry = tk.Entry(window, show="*")
button = tk.Button(window, text="Enter", command=checkPassword)
confirmLabel = tk.Label(window)
passwordLabel.pack()
passwordEntry.pack()
button.pack()
confirmLabel.pack()

window.mainloop()