python web框架中使用原生分页

本文实例为大家分享了python web框架实现原生分页的具体代码，供大家参考，具体内容如下

原生分页器 示例

#!/usr/bin/env python
# -*- coding:utf-8 -*-

class Pagination:

 def __init__(self, p, all_count, pre=10, max_show=11):
  '''
    :param p: 当前页码
    :param all_count: 数据总条数
    :param pre: 每页数据量
    :param max_show: 最多页码数
    '''
  try:
   self.p = int(p) # 传进来的页码
   if self.p <= 0:
    self.p = 1
  except Exception as e:
   self.p = 1

  # 总量
  # all_count = all_count
  # pre = per # 每页数据条数
  total_num, more = divmod(all_count, pre)
  if more:
   total_num += 1 # total_num总数据页数

  # 显示页码数
  max_show = max_show
  if total_num <= max_show: # 总数据量很小
   page_start = 1
   page_end = total_num
  else:
   if self.p - max_show // 2 <= 0: # 防止左边出现0页
    page_start = 1
    page_end = max_show

   elif self.p + max_show // 2 >= total_num + 1: # 防止右边出现超出
    page_end = total_num
    page_start = page_end - max_show
   else:
    page_start = self.p - max_show // 2
    page_end = self.p + max_show // 2

  # 数据的起始结束
  self.start = (self.p - 1) * pre
  self.end = self.p * pre

  # 页码
  self.page_start = page_start
  self.page_end = page_end
  self.total_num = total_num

 @property
 def page_html(self):
  li_list = []
  for i in range(self.page_start, self.page_end + 1):
   if i == self.p:
    li_list.append('<li class="active"><a href="?p={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{}</a></li>'.format(i, i))
   else:
    li_list.append('<li><a href="?p={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{}</a></li>'.format(i, i))

  # 添加页首 页尾

  li_list.insert(0,
      '<li><a href="?p={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" aria-label="Previous"><span aria-hidden="true">«</span></a></li>'.format(
       self.p - 1))
  li_list.append(
   '<li><a href="?p={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" aria-label="Next"><span aria-hidden="true">»</span> </a></li>'.format(self.p + 1))

  if self.p == 1:
   li_list[0] = '<li class="disabled"><span aria-hidden="true">«</span></li>'
  elif self.p == self.total_num:
   li_list[-1] = '<li class="disabled"><span aria-hidden="true">»</span></li>'

  pagehtml = ''.join(li_list)
  return pagehtml

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