用python写十进制与二进制之间转换

def s2e():
    e = [0,0,0,0,0,0,0,0]
    s = int(input("请输入一个十位数："))
    for i in range(0,8,1):
        e[i] = int(s%2)
        s=s//2
    e.reverse()
    print("二进制数为：",e)

def e2s():
    s=[0,0,0,0,0,0,0,0]
    a=0
    s=list(input("请输入一个二进制数："))
    s.reverse()
    for i in range(0,len(s),1):
        if int(s[i]) == 1:
            a+=pow(2,i)
    print("十进制数是：",a)
while 1:
    choose = int(input("二进制转十进制请输入1\n十进制转二进制请输入2\n"))
    if choose==1:
        e2s()
    elif choose==2:
        s2e()
    else:
        break