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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_nodes(self, request):
 """ Return menu's node for entries """

        nodes = []
        archives = []
        attributes = {'hidden': HIDE_ENTRY_MENU}
        for entry in Entry.published.all():
            year = entry.creation_date.strftime('%Y')
            month = entry.creation_date.strftime('%m')
            month_text = format(entry.creation_date, 'b').capitalize()
            day = entry.creation_date.strftime('%d')

            key_archive_year = 'year-%s' % year
            key_archive_month = 'month-%s-%s' % (year, month)
            key_archive_day = 'day-%s-%s-%s' % (year, month, day)

            if key_archive_year not in archives:
                nodes.append(NavigationNode(
                    year, reverse('zinnia:entry_archive_year', args=[year]),
                    key_archive_year, attr=attributes))
                archives.append(key_archive_year)

            if key_archive_month not in archives:
                nodes.append(NavigationNode(
                    month_text,
                    reverse('zinnia:entry_archive_month', args=[year, month]),
                    key_archive_month, key_archive_year,
                    attr=attributes))
                archives.append(key_archive_month)

            if key_archive_day not in archives:
                nodes.append(NavigationNode(
                    day, reverse('zinnia:entry_archive_day',
                                 args=[year, month, day]),
                    key_archive_day, key_archive_month,
                    attr=attributes))
                archives.append(key_archive_day)

            nodes.append(NavigationNode(entry.title, entry.get_absolute_url(),
                                        entry.pk, key_archive_day))
        return nodes