自定义的分页

class Paginator(object):
    def __init__(self,totleCount,currentPage,perPageNum=4,maxPageNum=7):
        # 数据总个数
        self.totle_count = totleCount
        # 当前页
        try:
            v = int(currentPage)
            if v < 0:
                v=1
            self.current_page = v
        except Exception as e:
            self.current_page = 1
        # 每页显示的行数
        self.per_page_item_num = perPageNum
        # 最大页码数
        self.max_page_num = maxPageNum

    def start(self):
        return (self.current_page-1)*self.per_page_item_num

    def end(self):
        return self.current_page * self.per_page_item_num

    @property
    def num_pages(self):
        # 总页数
        a,b = divmod(self.totle_count,self.per_page_item_num)
        if b == 0:
            return a
        return a+1

    def pager_num_range(self):
        # 当前页
        # self.current_pager
        # 最多显示页码的数量
        # self.per_pager_num
        # 总页数
        # self.num_pages
        # 如果 总页数 小于 最多显示页码数 返回  1--总页数
        if self.num_pages < self.max_page_num:
            return range(1, self.num_pages+1)

        part = self.max_page_num//2
        if self.current_page <= part:
            return range(1,self.max_page_num+1)

        if (self.current_page+part)>=self.num_pages:
            return range(self.num_pages-part,self.num_pages+1)

        return range(self.current_page-part,self.current_page+part+1)

    def page_str(self):
        page_list = []
        page_list.append('<ul class="pagination">')
        first = '<li><a href="/index?p=1" style="font-size:15px;">首页<a></li>'
        page_list.append(first)

        if self.current_page == 1:
            prev = '<li><a href="#" style="font-size:15px;">上一页<a></li>'
        else:
            prev = '<li><a href="/index?p=%s" style="font-size:15px;">上一页<a></li>'%(self.current_page-1)
        page_list.append(prev)

        for i in self.pager_num_range():
            if i == self.current_page:
                temp = '<li class="active"><a href="/index?p=%s" style="font-size:30px;">%s</a></li>'%(i,i)
            else:
                temp = '<li><a href="/index?p=%s" style="font-size:15px;">%s</a></li>' % (i, i)
            page_list.append(temp)

        if self.current_page == self.num_pages:
            prev = '<li><a href="#" style="font-size:15px;">下一页<a></li>'
        else:
            prev = '<li><a href="/index?p=%s" style="font-size:15px;">下一页<a></li>'%(self.current_page+1)
        page_list.append(prev)

        end = '<li><a href="/index?p=%s" style="font-size:15px;">尾页<a></li>'%(self.num_pages)
        page_list.append(end)
        page_list.append('</ul>')
        return ''.join(page_list)

    def stu_page_str(self):
        page_list = []

        first = '<li><a href="/students?p=1" style="font-size:15px;">首页<a></li>'
        page_list.append(first)

        if self.current_page == 1:
            prev = '<li><a href="#" style="font-size:15px;">上一页<a></li>'
        else:
            prev = '<li><a href="/students?p=%s" style="font-size:15px;">上一页<a></li>'%(self.current_page-1)
        page_list.append(prev)

        for i in self.pager_num_range():
            if i == self.current_page:
                temp = '<li class="active"><a href="/students?p=%s" style="font-size:30px;">%s</a></li>'%(i,i)
            else:
                temp = '<li><a href="/students?p=%s" style="font-size:15px;">%s</a></li>' % (i, i)
            page_list.append(temp)

        if self.current_page == self.num_pages:
            prev = '<li><a href="#" style="font-size:15px;">下一页<a></li>'
        else:
            prev = '<li><a href="/students?p=%s" style="font-size:15px;">下一页<a></li>'%(self.current_page+1)
        page_list.append(prev)

        end = '<li><a href="/students?p=%s" style="font-size:15px;">尾页<a></li>'%(self.num_pages)
        page_list.append(end)

        return ''.join(page_list)

    def tea_page_str(self):
        page_list = []

        first = '<li><a href="/teachers?p=1" style="font-size:15px;">首页<a></li>'
        page_list.append(first)

        if self.current_page == 1:
            prev = '<li><a href="#" style="font-size:15px;">上一页<a></li>'
        else:
            prev = '<li><a href="/teachers?p=%s" style="font-size:15px;">上一页<a></li>'%(self.current_page-1)
        page_list.append(prev)

        for i in self.pager_num_range():
            if i == self.current_page:
                temp = '<li class="active"><a href="/teachers?p=%s" style="font-size:30px;">%s</a></li>'%(i,i)
            else:
                temp = '<li><a href="/teachers?p=%s" style="font-size:15px;">%s</a></li>' % (i, i)
            page_list.append(temp)

        if self.current_page == self.num_pages:
            prev = '<li><a href="#" style="font-size:15px;">下一页<a></li>'
        else:
            prev = '<li><a href="/teachers?p=%s" style="font-size:15px;">下一页<a></li>'%(self.current_page+1)
        page_list.append(prev)

        end = '<li><a href="/teachers?p=%s" style="font-size:15px;">尾页<a></li>'%(self.num_pages)
        page_list.append(end)

        return ''.join(page_list)