Python学习之：文件操作一

import logging
logging.basicConfig(level=logging.INFO)

def check_number_exist(password_str):
    '''
    判断字符串中是否含有数字
    '''
    has_number = False

    for c in password_str:
        if c.isnumeric():
            has_number = True
            break
    return has_number


def check_letter_exist(password_str):
    '''
    判断字符串中是否含义字母
    '''
    has_letter = False

    for c in password_str:
        if c.isalpha():
            has_letter = True
            break

    return has_letter

def main():
    '''
    主函数
    '''
    try_times = 5

    while try_times >0:
        password = input('请输入密码：')

        # 判断密码强度
        strength_level = 0

        # 规则1：判断密码不能小于8位
        if len(password) >=8:
            strength_level += 1
        else:
            logging.info('密码长度要求至少8位！')

        # 规则2：判断密码必须包含数字
        if check_number_exist(password):
            strength_level += 1
        else:
            logging.info('密码必须包含数字！')

        # 规则3：判断密码必须包含字母
        if check_letter_exist(password):
            strength_level += 1
        else:
            logging.info('密码必须包含字母！')

        # 输入的密码写入文件
        f = open('password.txt','a')
        f.write('密码：{}，强度:{} \n'.format(password,strength_level))
        f.close()

        if strength_level == 3:
            logging.info('恭喜，输入的密码强度合格！')
            break
        else:
            logging.info('密码强度不合格！')
            try_times -= 1

    if try_times <=0:
        logging.info('密码次数过度，密码设置失败！')


if __name__ == '__main__':
    main()