python分页和session和计算时间差
分页
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 class Pagenation: 5 def __init__(self,current_page,all_item,base_url,each): 6 try: 7 page = int(current_page) 8 except: 9 page = 1 10 if page < 1: 11 page = 1 12 13 all_pager, c = divmod(all_item,each) 14 if c > 0: 15 all_pager += 1 16 self.each=each 17 self.current_page = page 18 self.all_pager = all_pager 19 self.base_url = base_url 20 21 @property 22 def start(self): 23 return (self.current_page - 1) * self.each 24 25 @property 26 def end(self): 27 return self.current_page * self.each 28 29 def string_pager(self): 30 list_page = [] 31 if self.all_pager < 11: 32 s = 1 33 t = self.all_pager + 1 34 else: # 总页数大于11 35 if self.current_page < self.each+1: 36 s = 1 37 t = 12 38 else: 39 if (self.current_page + 5) < self.all_pager: 40 s = self.current_page - 5 41 t = self.current_page + 5 + 1 42 else: 43 s = self.all_pager - 11 44 t = self.all_pager + 1 45 # 首页 46 # first = '<a href="/index/1">首页</a>' 47 # list_page.append(first) 48 # 上一页 49 # 当前页 page 50 if self.current_page == 1: 51 prev = '' 52 else: 53 prev = '<a class="up" href="/index/%s">上一页</a>' % (self.current_page - 1,) 54 list_page.append(prev) 55 for p in range(s, t): # 1-11 56 if p == self.current_page: 57 temp = '<a class="active" href="/index/%s">%s</a>' % (p, p) 58 else: 59 temp = '<a href="/index/%s">%s</a>' % (p, p) 60 list_page.append(temp) 61 if self.current_page == self.all_pager: 62 nex = '' 63 else: 64 nex = '<a class="up" href="/index/%s">下一页</a>' % (self.current_page + 1,) 65 66 list_page.append(nex) 67 68 # # 尾页 69 # last = '<a href="/index/%s">尾页</a>' % (self.all_pager,) 70 # list_page.append(last) 71 72 # 跳转 73 # jump = """<input type='text' /><a onclick="Jump('%s',this);">GO</a>""" % ('/index/') 74 script = """<script> 75 function Jump(baseUrl,ths){ 76 var val = ths.previousElementSibling.value; 77 if(val.trim().length>0){ 78 location.href = baseUrl + val; 79 } 80 } 81 </script>""" 82 # list_page.append(jump) 83 list_page.append(script) 84 str_page = "".join(list_page) 85 return str_page
Session
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 import hashlib 4 import time 5 6 CONTAINER = { 7 "随机字符串":{} 8 } 9 # CONTAINER【随机字符串】[is_login ] =delattr() 10 11 class Session: 12 13 def __init__(self, handler): 14 # self.handler.set_secure_cookie 15 # self.handler.get_secure_cookie 16 self.handler = handler 17 18 def __genarate_random_str(self, username): 19 obj = hashlib.md5() 20 obj.update(bytes(username + str(time.time()), encoding='utf-8')) 21 random_str = obj.hexdigest() 22 return random_str 23 24 def set_value(self, username, key, value): 25 """ 26 在Session中设置值 27 :param username: 28 :param key: 29 :param value: 30 :return: 31 """ 32 # 生成随机字符串，并发送到浏览器 完成 33 # 本地生成 34 # { 35 # 随机字符串： {'is_login' : True} 36 # } 37 random_bytes = self.handler.get_secure_cookie("__session__") 38 if not random_bytes: 39 random_str = self.__genarate_random_str(username) 40 self.handler.set_secure_cookie('__session__', random_str) 41 CONTAINER[random_str] = {} 42 else: 43 random_str = str(random_bytes, encoding='utf-8') 44 45 CONTAINER[random_str][key] = value 46 47 def get_value(self, key): 48 """ 49 在Session中获取值 50 :param key: 51 :return: 52 """ 53 random_bytes = self.handler.get_secure_cookie("__session__") 54 if not random_bytes: 55 return None 56 else: 57 random_str = str(random_bytes, encoding='utf-8') 58 user_info = CONTAINER.get(random_str, None) 59 if not user_info: 60 return None 61 ret = user_info.get(key, None) 62 return ret
计算时间差，用途，显示几小时前or几天前发布
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 4 import datetime 5 import time 6 def gap(old_time): 7 # old_time为旧的时间戳 8 now=int(time.time()) 9 gap=now-old_time 10 time_list=['','',''] 11 if gap>60: 12 fen, miao = divmod(gap, 60) 13 if fen>=60: 14 shi,fen=divmod(fen,60) 15 16 if shi>=24: 17 day,shi=divmod(shi,24) 18 time_list[0]='%d天'%day 19 20 time_list[1]='%d小时' % shi 21 22 time_list[2]= '%d分钟' % fen 23 else: 24 time_list.append('%d秒' % gap) 25 print(time_list) 26 return ''.join(time_list)
