19 ##### 属性方法案例-数据分页

class Pagination:

    def __init__(self, total_count, per_page_count, page_num):
        """

        :param total_count:  数据总条数
        :param per_page_count: 每页数据显示的条数
        :param page_num: 当前查看的页数
        """
        self.total_count = total_count
        self.per_page_count = per_page_count
        self.page_num = page_num

    # 每页数据显示10条数据
    # 第1页索引: 0:10
    # 第2页索引: 11:20
    # 第3页索引: 21:30

    @property
    def start(self):
        return (self.page_num - 1) * self.per_page_count

    @property
    def end(self):
        return self.page_num * self.per_page_count


data_list = [1, 2, 34, 4, 5, 56, 11, 1, 243, 1234]

pager = Pagination(192, 10, 3)

ret = data_list[pager.start:pager.end]  # 属性方法调用时,就不需要加括号了
print(ret)

posted @ 2024-09-27 06:21  jhchena  阅读(3)  评论(0编辑  收藏  举报