输入一段文字，统计数字，字符，空格数量

while True:
    msg = input("输入一段文字")
    if not msg: continue
    # str_count, int_count, space_count, special_count = 0, 0, 0, 0
    str_count = int_count = space_count = special_count = 0
    for i in msg:
        if i.isdigit():
            int_count += 1
        elif i.isalpha():
            str_count += 1
        elif i.isspace():
            space_count += 1
        else:
            special_count += 1
    print(f"数字：{int_count}个，字母：{str_count}个，空格：{space_count}个，其他：{special_count}个，")