[Tkinter] should not be getting this exception...confused

[MrP]

Hello,

I am trying to learn python class programming and I have run into an exception when trying to run a small program I found on the internet. It has me confused as I see people using the line of code with no problem

Error:
builtins.TypeError: Buttons() takes no arguments

the snippit of code I am referring to is

if __name__ == '__main__':
    root = tk.Tk()
    b = Buttons(root)
    root.mainloop()

can anybody explain why I getting this exception?