真正的python解法

a = input()
b = 0
c = 0
d = 0
for i in range(len(a)):
    if(a[i] >= 'A' and a[i] <= 'Z'):
        b += 1
    elif(a[i] >='a'and a[i] <= 'z'):
        b += 1
    elif(a[i] >= '0' and a[i] <= '9'):
        c += 1
    else:
        d += 1
print("英文字母数量:",b)
print("数字数量:",c)
print("其他字符数量:",d)