Icon in tkinter

[DT2000]

Give this a try, I do not run Linux so I cannot test on that system.

def main():
    '''Docstring'''
    root = tk.Tk()
    root.title('Johnny\'s CookBook')
    img = tk.PhotoImage(file='/home/johnny/Desktop/CookBook/images/cookbook_logo.png')
    root.configure(width=img.width())
    root.resizable(width=False, height=False)
    photo = PhotoImage(file = 'images/ratt2b.png')
    root.iconphoto(False, photo)
    RootWindow(root)
    root.mainloop()