paginator.py 文件源码

def show_page(self, page, *, first=False):
        self.current_page = page
        entries = self.get_page(page)
        p = []
        for t in enumerate(entries, 1 + ((page - 1) * self.per_page)):
            p.append('%s. %s' % t)

        self.embed.set_footer(text='Page %s/%s (%s entries)' % (page, self.maximum_pages, len(self.entries)))

        if not self.paginating:
            self.embed.description = '\n'.join(p)
            return await self.bot.send_message(self.message.channel, embed=self.embed)

        if not first:
            self.embed.description = '\n'.join(p)
            await self.bot.edit_message(self.message, embed=self.embed)
            return

        # verify we can actually use the pagination session
        if not self.permissions.add_reactions:
            raise CannotPaginate('Bot does not have add reactions permission.')

        if not self.permissions.read_message_history:
            raise CannotPaginate('Bot does not have Read Message History permission.')

        p.append('')
        p.append('Confused? React with \N{INFORMATION SOURCE} for more info.')
        self.embed.description = '\n'.join(p)
        self.message = await self.bot.send_message(self.message.channel, embed=self.embed)
        for (reaction, _) in self.reaction_emojis:
            if self.maximum_pages == 2 and reaction in ('\u23ed', '\u23ee'):
                # no |<< or >>| buttons if we only have two pages
                # we can't forbid it if someone ends up using it but remove
                # it from the default set
                continue
            try:
                await self.bot.add_reaction(self.message, reaction)
            except discord.NotFound:
                # If the message isn't found, we don't care about clearing anything
                return