登陆系统，打印 修改。用户数据

# 在一个文件里存多个人的个人信息，如以下
# 用户名   密码      年龄  职位      部门
# username password  age position department
# alex     abc123    24   Engineer   IT
# rain     df2@432    25   Teacher   Teching


# 1.输入用户名密码，正确后登录系统 ，打印
# 1. 修改个人信息
# 2. 打印个人信息
# 3. 修改密码
# 2.每个选项写一个方法
# 3.登录时输错3次退出程序



# 一次行取出所有的文件内容，并且{'alex': ['alex', 'abc123', '24', 'Engineer', 'IT', '13188888888']}
def pick_up_all_info():
    with open('persinfo', 'r', encoding='utf-8') as read_f:
        user_dict = {}
        for line in read_f:
            user_lise = line.strip().split(',')
            user_dict[user_lise[0]] = user_lise
        return user_dict


# 接收pick_up_info传来的参数，打印用户信息
def print_info(all_user_info,name):
    user_info = all_user_info[name]
    msg = '''
    --------------------
    Name:  %s
    Age:   %s
    Job:   %s
    Dept:  %s
    Phone: %s
    --------------------
    '''%(user_info[2],
         user_info[3],
         user_info[4],
         user_info[5],
         user_info[6])
    print(msg)


# 修改信息
def chang_info_to_file(all_user_info,name):
    user_info = all_user_info[name]
    msg = '''
1. Name:  %s
2. Age:   %s
3. Job:   %s
4. Dept:  %s
5. Phone: %s
    '''%(user_info[2],
         user_info[3],
         user_info[4],
         user_info[5],
         user_info[6])

    msg_dic = {
        '1': user_info[2],
        '2': user_info[3],
        '3': user_info[4],
        '4': user_info[5],
        '5': user_info[6]
    }
    print(msg)
    while True:
        print('当前用户信息%s' % ('  '.join(user_info)))
        chioce = input('请选择要修改的选项 Q退出：').strip().upper()
        if chioce.isalnum():
            if chioce != 'Q'and chioce.isdigit():
                print('current value:%s' % msg_dic[chioce])
                revise_new = input('new value:').strip()
                if revise_new:
                    user_info[int(chioce) + 1] = revise_new
                else:
                    print('不能为空，或全是空格')
            elif chioce == 'Q':
                print('修改完成')
                break
            else:
                print('输入有误请重新输入')
    with open('persinfo','w',encoding='utf-8') as write_f:
        for i in all_user_info:
            user_str = ','.join(all_user_info[i])
            write_f.write(user_str)
            write_f.write('
')


#修改密码
def chang_pwd(all_user_info,name):
    user_info = all_user_info[name]
    while True:
        print('current password:%s'%user_info[1])
        revise_new = input('new password：').strip()
        revise_new_two = input('Confirm new password：').strip()
        if not revise_new.isspace():
            if revise_new == revise_new_two:
                all_user_info[name][1] = revise_new
                print('修改成功')
                break
            else:
                print('密码输入不一致，请重新输入')
                continue
        else:
            print('不能有空格存在')
            continue
    with open('persinfo','w',encoding='utf-8') as write_f:
        for i in all_user_info:
            user_str = ','.join(all_user_info[i])
            write_f.write(user_str)
            write_f.write('
')


if __name__ == '__main__':
    msg = '''
1：修改个人信息
2：打印个人信息
3：修改密码'''

    msg_dic = {
        '1': chang_info_to_file,
        '2': print_info,
        '3': chang_pwd
    }
    USER_DICT = pick_up_all_info()
    name = None
    # print(USER_DICT)
    counte = 3
    while counte > 0:
        name = input('username:').strip()
        pwd = input('password:').strip()
        if name in USER_DICT:
            if pwd == USER_DICT[name][1]:
                print(('Welcome %s' % name).center(50, '-'))
                break
            else:
                print('User Name or Password Force')
        else:
            print('User Name does not exist')
        counte -= 1
    else:
        exit('谢谢使用')

    while True:
        print(msg)
        chioce = input('请按编号选择要做的事情 Q退出：').upper().strip()
        if chioce.isdigit():
            msg_dic[chioce](USER_DICT, name)
            if chioce == 'Q':
                exit('谢谢使用')
        else:
            print('请正确输入')



#根据name取出指定的，用户信息。 上面代码用不到。
def pick_up_info(name,pwd):
    # 每次都需要打开文件进行判断，返回对应当前用户名的 所有信息
    # {'peiqi': ['peiqi', '456', '26', 'Teacher', 'IT', '13188888888']}
    with open('persinfo', 'r', encoding='utf-8') as read_f:
        user_dict = {}
        tag = False  #用于判断是否有这个用户
        for line in read_f:
            user_li = line.strip().split(',')  #对读取到的字符串 去除
 按 ，分割成列表
            if name in user_li:
                tag = True # 当文件中有这个用户时 tag=Ture
                if pwd == user_li[1]:
                    user_dict[user_li[0]] = user_li
                    break
                else:
                    print('账户名密码不对')
        else:
            if not tag:   #当文件中不存在输入的用户名时，就运行。
                print('用户不存在')
        return user_dict