分页

分页练习：让用户输入页数，显示用户输入的那一页，一页有10条数据

1.第一种

li = []
for i in range(1,10000):
    li.append("sb%s" % i)
while 1:
    input_a = int(input("<<"))
    paer = 10
    start = (input_a-1)*10
    end = input_a*paer  
    a = li[start:end]
    for item in a:
        print(item)

2.面向对象

class reper(object):
    def __init__(self,disply,input_a,paer=10):
        self.disply = disply
        self.input_a=input_a
        self.paer = paer

    @property
    def start(self):
        return (self.input_a-1)*10
    @property
    def end(self):
        return self.input_a*self.paer
    def show(self):
        ret = self.disply[self.start:self.end]
        for item in ret:
            print(item)

li = []
for i in range(1,100):
    li.append("sb%s" % i)
while 1:
    input_a = int(input("<<"))

    obj = reper(li,input_a)
    obj.show()