Python 中用面向对象的思想处理网页翻页 (初级)

第一种处理方法:

 class Pagenation(object):
     """
     处理分页相关的代码
     """

     def __init__(self,page,per_page_num=10):
         """
         初始化
         :param page: 当前要查看的页面
         :param per_page_num: 每页默认要显示的数据行数
         """
         self.page = page
         self.per_page_num = per_page_num

     @property
     def start(self):
         """
         计算索引的起始位置
         :return:
         """
         return (self.page-1) * self.per_page_num

     @property
     def end(self):
         """
         计算索引的结束位置
         :return:
         """
         return self.page * self.per_page_num

 data_list = []

 for i in range(1, 901):
     data_list.append('alex-%s' % i)

 while True:
     # 1. 要查看的页面
     page = int(input('请输入要查看的页码:'))

     obj = Pagenation(page)
     page_data_list = data_list[obj.start:obj.end]
     for item in page_data_list:
         print(item)

第二种方法:

 class Pagenation(object):
     """
     处理分页相关的代码
     """

     def __init__(self,data_list,page,per_page_num=10):
         """
         初始化
         :param data_list: 所有的数据
         :param page: 当前要查看的页面
         :param per_page_num: 每页默认要显示的数据行数
         """
         self.data_list = data_list
         self.page = page
         self.per_page_num = per_page_num

     @property
     def start(self):
         """
         计算索引的起始位置
         :return:
         """
         return (self.page-1) * self.per_page_num

     @property
     def end(self):
         """
         计算索引的结束位置
         :return:
         """
         return self.page * self.per_page_num

     def show(self):
         result = self.data_list[self.start:self.end]
         for row in result:
             print(row)

 data_list = []

 for i in range(1, 901):
     data_list.append('alex-%s' % i)

 while True:
     # 1. 要查看的页面
     page = int(input('请输入要查看的页码:'))
     obj = Pagenation(data_list,page)
     obj.show()