题解 | #进制转换#

num1 = (0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15)
num2 = ("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F")
dic = dict(zip(num2,num1))
a = input("")
a = a[2:]
length = len(a)
i = -1
sum = 0
flag = True
while flag:
    sum = sum+dic[a[i]]*(16**(-1-i))
    i = i-1
    if i<-length:
        flag = False
print(sum)

什么时候使用字典？ 本题中字符与数字一一对应时

善于使用数组倒序