問題

我在寫下面的程式時，遇到報錯提示AttributeError: 'itertools.cycle' object has no attribute 'next'

menu_options = (('Say Hello', icons.next(), hello),
                    ('Switch Icon', None, switch_icon),
                    ('A sub-menu', icons.next(), (('Say Hello to Simon', icons.next(), simon),
                                                  ('Switch Icon', icons.next(), switch_icon),
                                                 ))
                   )
 

解決方法

這是因為版本問題，只要將程式icon.next()改成next(icon)就好了。

    menu_options = (('Say Hello', next(icons), hello),
                    ('Switch Icon', None, switch_icon),
                    ('A sub-menu', next(icons), (('Say Hello to Simon', next(icons), simon),
                                                  ('Switch Icon', next(icons), switch_icon),
                                                 ))
                   )