python 输入一行，然后分别统计

while True:
    try:
        in_str = input()
        c_num ,space_num ,digit_num , other_num = 0 ,0,0,0
        for x in in_str :
            if x.isalpha():
                c_num = c_num +1
            elif x == " ":
                space_num = space_num +1 
            elif x.isdigit():
                digit_num = digit_num +1 
            else:
                other_num = other_num +1 
        print(c_num)
        print(space_num)
        print(digit_num)
        print(other_num)
    except:
        break