利用目前学的流程控制写的

'''ATM机需求：1.登陆    输入账号输入密码    每日只有3次登陆密码错误的机会，超过3次禁止登陆2.查询余额3.存款4.取款5.转帐6.退出'''infos = [    {'name':'jack','pwd':'123','yue':0},    {'name':'bran','pwd':'123','yue':0},    {'name':'egon','pwd':'123','yue':0},]# 禁止登陆ban = False# 登陆状态login_state = False# 账号密码错误次数login_num = 0# 菜单 choice choice = 0# 输入的用户名name = ''# 输入的密码pwd = ''# 余额yue = 0while ban == False:    # 登陆    while login_state == False:        # 登陆        name = input('请输入账号：')        pwd = input('请输入密码：')        # 查询账号密码是否正确        for info in infos:            if name == info['name'] and pwd == info['pwd']:                print('登陆成功！')                login_state = True                yue = info['yue']                break        # 如果没有账号密码不正确则 运行下面的代码        if login_state == False:            login_num += 1            print('账号密码错误！请重新输入！剩余次数 %s' % (3 - login_num))            if login_num == 3:                print('今日登陆错误次数超限，请明日再来')                ban = True                break    # 打印菜单    if login_state == True and choice == 0:        print('''        1 查询        2 存款        3 转帐        4 取款        5 退出        ''')        choice = int(input('请输入操作状态：'))                    # 查询    if login_state == True and choice == 1:        print('%s 账户的余额为 %s ¥' % (name,yue))        choice = 0        # 存款    if login_state == True and choice == 2:        money = int(input('请输入你的金额：'))        for info in infos:            if name == info['name']:                info['yue'] += money                yue += money                print('%s 账户存入 %s ¥' % (name,money))        choice = 0    # 转帐:    if login_state == True and choice == 3:        to_state = 0 # 1:成功 2：余额不足        to_num = 0        while to_state == 0:            to_name = input('请输入转入的用户名：')            # 判断 用户是否存在            for info in infos:                if to_name == info['name']:                    money = int(input('请输入转帐的金额：'))                    # 判断自己账户的金额是否足够                    if yue >= money:                        info['yue'] += money                        yue -= money                        print('你给 %s 用户成功转入 %s ¥'%(to_name,money))                        to_state = 1                        break                    else:                        print('你的余额不足，请充值后再转帐')                        to_state = 2            if to_state == 1:                break            elif to_state == 2:                break            else:                to_num += 1                print('你输入的用户不存在,请重新输入：')        choice = 0            # 取款    if login_state == True and choice == 4:        money = int(input('请输入你的取款金额：'))        # 判断输入的金额是否小于等于余额        if money <= yue:            print('请再出钞口取钞票吧！')            yue -= money            choice = 0        else:            print('你输入的金额大于你的余额，无法取款！')    # 退出    if login_state == True and choice == 5:        break