定义一个函数，统计输入的一串字符包含多少个数字，多少个英文字母，多少个空白字符，多少个其他字符（Python经典编程案例）

不念不忘少年蓝@ 2024-04-17 14:45 37阅读 0赞

定义一个函数，统计输入的一串字符包含多少个数字，多少个英文字母，多少个空白字符，多少个其他字符

def count_str_char(string):
        char_num, digit_num, space_num, other_num = 0, 0, 0, 0
        for c in string:
            if c.isdigit(): digit_num += 1
            elif c.isalpha(): char_num += 1
            elif c.isspace(): space_num += 1
            else: other_num += 1
        return char_num, digit_num, space_num, other_num
    while(True):
        string = input("请输入一个字符串:")
        if string == 'exit':
            import sys
            sys.exit(0)
        char_num, digit_num, space_num, other_num = count_str_char(string)
        print('字母个数', char_num)
        print('数字个数', digit_num)
        print('空白个数', space_num)
        print('其他字母个数', other_num)

执行结果如下图：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N1aV95b25naHVh_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N1aV95b25naHVh_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/20a41d1d933a49bfb7c1b4d0a900ee58.png