16.6

I am pretty sure this is what is copied from 16.6 Object-Oriented GUIs but I receive an error when it is run.

myapp = Counter(window)

TypeError: object() takes no parameters

import tkinter
class Counter:
    """A simple counter GUI using object-oriented programming."""
    def __int__(self, parent):
        """ Create the GUI """
        # Framework.
        self.parent = parent
        self.frame = tkinter.Frame(parent)
        self.frame.pack()
        # Model.
        self.state = tkinter.IntVar()
        self.state.set(1)
        # Label displaying current state.
        self.label = tkinter.Label(self.frame, textvariable=self.state)
        self.label.pack()
        # Buttons to control application.
        self.up = tkinter.Button(self.frame, text='Up', command=self.up_click)
        self.up.pack(side='left')
        self.right = tkinter.Button(self.frame, text='quit',
                                    command=self.quit_click)
        self.right.pack(side='left')
    def up_click(self):
        """ Handle click on 'up' button. """
        self.state.set(self.state.get() + 1)
    def quit_click(self):
        """ Handle click on 'quit' button. """
        self.parent.destroy()
if __name__ == '__main__':
    window = tkinter.Tk()
    myapp = Counter(window)
    window.mainloop()

There’s a typo in your code, i.e.

def __int__(self, parent):
    """ Create the GUI """

should be,

def __init__(self, parent):
    """ Create the GUI """

‘int’ should be ‘init’