python实现数据分页小练习

# 非函数式:
data_list = []
for i in range(1,901):
    data_list.append('豆谷云-%s' % i)

while True:

    # 1.你要查看的页码
    page = int(input("请输入你要查看的页码:"))

    # 2.每页显示多少条数据
    per_page_num = 10

    # 3.定义每页开始位置和结束位置
    start = (page - 1) * per_page_num
    end = page * per_page_num

    page_data_list = data_list[start:end]
    for item in page_data_list:
        print(item)

# 面向对象:
class Pagenation(object):

    def __init__(self,data_list,page,per_data_num = 10):
        '''
        初始化
        :param data_list: 所有数据列表
        :param page: 当前要查看的列表页
        :param per_data_num: 每页默认要显示几条
        '''
        self.data_list = data_list
        self.page = page
        self.per_data_num = per_data_num

    @property
    def start(self):
        '''
        计算引索的起始位置
        :return:
        '''
        return (self.page - 1) * self.per_data_num

    @property
    def end(self):
        '''
        计算引索的结束位置
        :return:
        '''
        return self.page * self.per_data_num

    def show(self):
        '''
        切片取数据,展示对应分页的结果
        :return:
        '''
        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('豆谷云-%s' % i)

while True:

    # 1.输入要查看的页码
    page = int(input("请输入要查看的页码:"))

    obj = Pagenation(data_list,page)

    obj.show()