自己开发的python分页插件

 1 from django.shortcuts import render
 2 from app01.pager import Pagination
 3 # Create your views here.
 4 
 5 user_list = []
 6 
 7 for i in range(1,666):
 8     user = {‘name‘:‘root%s‘% i ,‘age‘:i}
 9     user_list.append(user)
10 
11 
12 def index(request):
13     cur_page = request.GET.get(‘p‘)
14 
15     item = Pagination(len(user_list),cur_page,‘index.html‘)
16     data = user_list[item.start:item.end]
17     return render(request,‘index.html‘,{‘data‘:data,‘item‘:item})

  1 class Pagination:
  2     def __init__(self,maxPageItems,currenPageNum,url,pageItemLs=20,maxPageNum=11):
  3         ‘‘‘
  4 
  5         :param maxPageItems:  总共有多少条数据  ---  page_items_max
  6         :param currenPageNum: 当前页码          ---  curren_page_num
  7         :param pageItemLs:    一页显示多少条数据---  page_item_list
  8         :param maxPageNum:    页面最多显示多少页码---max_page_num
  9         :param url:         在哪个页面进行分页   --- url
 10         ‘‘‘
 11         self.url = url
 12         self.page_items_max = maxPageItems
 13         self.page_item_list = pageItemLs
 14 
 15         #如果最多显示页码大于总页数，那就把总页数赋值给最多显示页码
 16         self.max_page_num = maxPageNum if self.total_page_num > maxPageNum else self.total_page_num
 17         ‘‘‘
 18         如果传入的当前页码不是整数，当前页码就直接赋值为1，
 19         如果传入的当前页码小于等于0 ，当前页码就直接赋值为1，
 20         如果传入的当前页码大于数据能分出来的最大页码数，就把当前页码赋值为最大页码数
 21         否则就把传入的当前页码赋值给当前页码
 22         ‘‘‘
 23         try:
 24             v = int(currenPageNum)
 25             if v <= 0 :
 26                 self.curren_page_num = 1
 27             elif v > self.total_page_num:
 28                 self.curren_page_num = self.total_page_num
 29             else:
 30                 self.curren_page_num = v
 31         except Exception as e:
 32             self.curren_page_num = 1
 33 
 34 
 35     @property
 36     def total_page_num(self):
 37         ‘‘‘
 38         计算总页数
 39         :return:
 40         ‘‘‘
 41         total,b = divmod(self.page_items_max,self.page_item_list)
 42         total = total + 1 if b != 0 else total
 43         return  total
 44 
 45     @property
 46     def start(self):
 47         ‘‘‘计算数据切片的起始切片位置‘‘‘
 48         return ( self.curren_page_num -1 ) * self.page_item_list
 49 
 50     @property
 51     def end(self):
 52         ‘‘‘计算数据切片的结束切片位置‘‘‘
 53         return  self.curren_page_num * self.page_item_list
 54 
 55 
 56     def pagenum_range(self):
 57         ‘‘‘
 58         动态生成页码
 59         :return:
 60         ‘‘‘
 61         #以显示页码数量的一半为临界点
 62         page = self.max_page_num // 2
 63         if self.curren_page_num <= page:
 64             #如果当前页码小于临界点，页码的显示就是 1 - 最大能分出的页码数
 65             return range(1,self.max_page_num+1)
 66 
 67             #如果(当前页 + page) 要大于 总页码数量， 页码数就显示  （总页数 - 一页最多显示页码数 +1） - （总页数 + 1）
 68         if (self.curren_page_num + page) > self.total_page_num :
 69             return range(self.total_page_num - self.max_page_num + 1 ,self.total_page_num +1 )
 70 
 71          # 页码数就显示  （当前页码数 - page） - （当前页 + page + 1）
 72         return  range(self.curren_page_num - page,self.curren_page_num + page + 1)
 73 
 74     def item_list(self):
 75         ‘‘‘
 76         返回HTML代码
 77         :return:
 78         ‘‘‘
 79 
 80         item = []
 81         ele = ‘<li><a href="%s?p=1">首页</a></li>‘ % (self.url)
 82         item.append(ele)
 83         if self.curren_page_num == 1 :
 84             ele = ‘<li class="disabled"><a>上一页</a></li>‘
 85         else:
 86             ele = ‘<li><a href="%s?p=%s">上一页</a></li>‘ % (self.url,self.curren_page_num - 1)
 87         item.append(ele)
 88         for i in self.pagenum_range():
 89             if i == self.curren_page_num:
 90                 ele = ‘<li class="active"><a href="%s?p=%s">%s</a></li>‘ % (self.url,i,i)
 91             else:
 92                 ele = ‘<li><a href="%s?p=%s">%s</a></li>‘ % (self.url, i, i)
 93             item.append(ele)
 94 
 95         if self.curren_page_num == self.total_page_num:
 96             ele = ‘<li class="disabled"><a>下一页</a></li>‘
 97         else:
 98             ele = ‘<li><a href="%s?p=%s">下一页</a></li>‘% (self.url,self.curren_page_num + 1)
 99         item.append(ele)
100 
101         ele = ‘<li><a href="%s?p=%s">尾页</a></li>‘ % (self.url,self.total_page_num)
102         item.append(ele)
103 
104 
105         return ‘‘.join(item)