按钮错误，但我得到IndexError：列表索引超出范围

Question

I have two buttons on my interface. I want both of them to be able to call their respective functions when I either click on them or a hit the Enter Key .
The problem I'm having is that only the last button in the traveral focus gets activated when I hit the Enter Key , even if the preceeding one has the focus . What can I do to resolve this problem.
Useful answer are welcome and appreciated.

This is the problem in question:

from tkinter import *

w = Tk()

def startProgram(event = None):
    print('Program Starting')

def readyContent(event = None):
    print('Content being prepared')

# Buttons
Button(text='Prepare', command=readyContent).grid(row=10,column=2)
w.bind('<Return>',readyContent) # Binds the Return key to a Function
Button(text='Start', command=startProgram).grid(row=10,column=3)
w.bind('<Return>',startProgram) # Binds the Return key to a Function

w.mainloop()

When you click on the Prepare or Start button, in return you get either Content being prepared or Program Starting repectively. Nothing like that happens when you use the Tab Key to give focus to one button or the other. Even if the focus is on the Prepare button, when you hit Enter you get: Program Starting

Answer 1

This is the solution to my problem. I hope it helps anyone else having the same problem as me.

from tkinter import *

w = Tk()

def startProgram(event = None):
    print('Program Starting')

def readyContent(event = None):
    print('Content being prepared')

# Buttons
btn1 = Button(text='Prepare', command=readyContent)
btn1.grid(row=10,column=2)
btn1.bind('<Return>',readyContent) # Binds the Return key to a Function
btn2 = Button(text='Start', command=startProgram)
btn2.grid(row=10,column=3)
btn2.bind('<Return>',startProgram) # Binds the Return key to a Function

w.mainloop()

Have a good day! :)