原生分頁器 示例
#!/usr/bin/env python
# -*- coding:utf-8 -*-
class Pagination:
def __init__(self, p, all_count, pre=10, max_show=11):
'''
:param p: 當前頁碼
:param all_count: 數據總條數
:param pre: 每頁數據量
:param max_show: 最多頁碼數
'''
try:
self.p = int(p) # 傳進來的頁碼
if self.p <= 0:
self.p = 1
except Exception as e:
self.p = 1
# 總量
# all_count = all_count
# pre = per # 每頁數據條數
total_num, more = divmod(all_count, pre)
if more:
total_num += 1 # total_num總數據頁數
# 顯示頁碼數
max_show = max_show
if total_num <= max_show: # 總數據量很小
page_start = 1
page_end = total_num
else:
if self.p - max_show // 2 <= 0: # 防止左邊出現0頁
page_start = 1
page_end = max_show
elif self.p + max_show // 2 >= total_num + 1: # 防止右邊出現超出
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
# 數據的起始結束
self.start = (self.p - 1) * pre
self.end = self.p * pre
# 頁碼
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={}">{}</a></li>'.format(i, i))
else:
li_list.append('<li><a href="?p={}">{}</a></li>'.format(i, i))
# 添加頁首 頁尾
li_list.insert(0,
'<li><a href="?p={}" aria-label="Previous"><span aria-hidden="true">«</span></a></li>'.format(
self.p - 1))
li_list.append(
'<li><a href="?p={}" 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