分类统计字符个数

chara = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
number = "0123456789"
str_get = input()

letter = 0
digit = 0
other = 0
for i in str_get:
    if i in chara:
        letter += 1
    elif i in number:
        digit += 1
    else:
        other += 1
print(f'letter = {letter}, digit = {digit}, other = {other}')