代码。银行。优化5

# 优化
# 1.更改密码成功请重新登录，这个需要优化，让别人更改了密码之再重新输入账号密码
import random
flag = True
log = True
d = {}
count = 0
with open('b.txt', mode='rt', encoding='utf-8') as f:
    res = f.readlines()
    for line in res:
        i = line.strip('\n').split(':')
        d[i[0]] = i[1]
    while flag:
        if count == 3:
            print('你已经输入错误三次了')
            print('继续y/退出n')
            commend = input('y/n>>>:')
            if commend == 'y':
                count = 0
                continue
            elif commend == 'n':
                flag = False
                break
        inp_user = input('请输入您的账号>>>:').strip()
        if inp_user not in d:
            print('对不起用户名不存在,请重新输入')
            count += 1
            continue
        else:
            inp_pwd = input('请输入您的密码>>>:').strip()
            if d[inp_user] == inp_pwd:
                count = 0
                while flag:
                    code = ''
                    if count == 3:
                        print('验证码错误多次，请重新登录')
                        count = 0
                        Flag = False
                        break
                    else:

                        for line in range(4):
                            item = str(random.randint(0, 9))
                            i = chr(random.randint(65, 90))
                            j = chr(random.randint(97, 122))
                            code += random.choice([i, j, item])
                        print(code)
                        commend = input('请输入图中的验证码>>>:')
                        if commend.upper() == code.upper():
                            print('登录正确')
                            while flag:
                                log = True
                                print('查询余额请按1!')
                                print('转账请按2!')
                                print('存款请按3！')
                                print('取款请按4！')
                                print('更改密码请按5!')
                                print('退出请按0!')
                                commend = input('请选择您的操作>>>:')
                                if commend == '1':
                                    d = {}
                                    with open('a.txt', mode='rt', encoding='utf-8') as f1:
                                        res = f1.readlines()
                                        if len(res) == 0:
                                            print('对不起您的余额为0')
                                            print('返回主界面请按1,退出请按2')
                                            commend = input('>>>:')
                                            if commend == '1':
                                                continue
                                            elif commend == '2':
                                                flag = False
                                                break
                                        for line in res:
                                            i = (line.strip('\n')).split(':')
                                            d[i[0]] = i[1]
                                    print('您的余额还有', d[inp_user])
                                    print('返回主菜单请按1,退出请按2')
                                    commend = input('请选择您的操作>>>:')
                                    if commend == '1':
                                        continue
                                    elif commend == '2':
                                        print('再见')
                                        flag = False
                                elif commend == '2':
                                    print(f.closed)
                                    count = 0
                                    while log:
                                        if count == 3:
                                            print('对不起您已经输入错误三次了')
                                            print('继续y/退出n/返回主菜单F')
                                            commend = input('y/n/F>>>:')
                                            if commend == 'y':
                                                count = 0
                                                continue
                                            elif commend == 'n':
                                                flag = False
                                                log = False
                                                break
                                            elif commend == 'F':
                                                log = False
                                                break
                                        username = input('请输入转账用户名>>>:')
                                        if username in d:
                                            while log:
                                                d = {}
                                                with open('a.txt', mode='rt', encoding='utf-8') as f2:
                                                    res = f2.readlines()
                                                    for line in res:
                                                        i = line.strip('\n').split(':')
                                                        d[i[0]] = i[1]
                                                    money = input('请输入转账金额>>>:')
                                                    if int(d[inp_user]) > int(money):
                                                        res1 = int(d[inp_user]) - int(money)
                                                        res2 = int(d[username]) + int(money)
                                                        with open('a.txt', mode='at', encoding='utf-8') as f2:
                                                            line1 = '%s:%s\n' % (inp_user, res1)
                                                            line2 = '%s:%s\n' % (username, res2)
                                                            f2.write(line1)
                                                            f2.write(line2)
                                                        import time
                                                        with open('access.log', mode='at', encoding='utf-8') as f:
                                                            f.write('%s %s 转账给 %s %s元\n' % \
                                                                    (time.strftime('%Y-%m-%d %H:%M:%S'), inp_user, username, money))

                                                        print('转账成功,您当前余额为', res1)
                                                        print('继续转账请按1,返回主菜单请按2,退出请按3')
                                                        commend = input('请选择您的操作>>>:')
                                                        if commend == '1':
                                                            continue
                                                        elif commend == '2':
                                                            log = False
                                                        elif commend == '3':
                                                            print('再见')
                                                            flag = False
                                                            log = False
                                                    else:
                                                        print('转账失败,余额不足,请重新输入')
                                                        continue
                                        else:
                                            print('用户名不存在,请重新输入')
                                            count += 1
                                            continue

                                elif commend == '3':
                                    d = {}
                                    while log:
                                        with open('a.txt', mode='rt', encoding='utf-8') as f3:
                                            res = f3.readlines()
                                            for line in res:
                                                i = line.strip('\n').split(':')
                                                d[i[0]] = i[1]
                                        money = input('请输入存款金额>>>:')
                                        if money.isdigit():
                                            res1 = int(money) + int(d[inp_user])
                                            with open('a.txt', mode='at', encoding='utf-8') as f3:
                                                res2 = '%s:%s\n' % (inp_user, res1)
                                                f3.write(res2)
                                                print('存款成功,当前余额为', res1)
                                                print('继续存款请按1,返回主界面请按2,退出请按3')
                                                commend = input('请输入您的选择>>>:')
                                                if commend == '1':
                                                    continue
                                                elif commend == '2':
                                                    log = False
                                                elif commend == '3':
                                                    print('再见')
                                                    flag = False
                                                    log = False
                                        else:
                                            print('请输入纯数字')
                                            continue

                                elif commend == '4':
                                    d = {}
                                    while log:
                                        with open('a.txt', mode='rt', encoding='utf-8') as f4:
                                            res = f4.readlines()
                                            for line in res:
                                                i = line.strip('\n').split(':')
                                                d[i[0]] = i[1]
                                            money = input('请输入取款金额>>>:')
                                            if int(d[inp_user]) > int(money):
                                                res = int(d[inp_user]) - int(money)
                                                with open('a.txt', mode='at', encoding='utf-8') as f4:
                                                    res1 = '%s:%s\n' % (inp_user, res)
                                                    f4.write(res1)
                                                    print('取款成功,请等待查收')
                                                    print('继续取款请按1,返回主界面请按2,退出请按3')
                                                    commend = input('请输入123>>>:')
                                                    if commend == '1':
                                                        continue
                                                    elif commend == '2':
                                                        log = False
                                                    elif commend == '3':
                                                        print('再见')
                                                        flag = False
                                                        log = False
                                            else:
                                                print('取款失败，余额不足')
                                                continue

                                elif commend == '5':
                                    d = {}
                                    with open('b.txt', mode='rt', encoding='utf-8') as f:
                                        res = f.readlines()
                                        for line in res:
                                            i = line.strip('\n').split(':')
                                            d[i[0]] = i[1]
                                    while log:
                                        count = 0
                                        while log:
                                            count += 1
                                            password = input('请输入您的旧密码>>>:').strip()
                                            if d[inp_user] == password:
                                                while log:
                                                    password1 = input('请输入您的新密码>>>:').strip()
                                                    password2 = input('请再次输入您的新密码>>>:').strip()

                                                    if password1 == password2:
                                                        with open('b.txt', mode='at', encoding='utf-8') as f:
                                                            res = '%s:%s\n' % (inp_user, password2)
                                                            f.write(res)
                                                            print('密码更改成功,请重新登录')
                                                            flag = False
                                                            log = False
                                                    else:
                                                        print('俩次密码输入不相同,请重新输入')
                                                        continue

                                            else:
                                                if count == 3:
                                                    print('您已经三次输入错误了，是/否退出账号')
                                                    while log:
                                                        commend = input('yes/no>>>:')
                                                        if commend == 'yes':
                                                            print('再见')
                                                            log = False
                                                            flag = False
                                                        elif commend == 'no':
                                                            count = 0
                                                            break
                                                        else:
                                                            print('输入无效,请输入yes或者no')
                                                else:
                                                    print('原密码输入错误，请重新输入')

                                elif commend == '0':
                                    print('再见')
                                    flag = False
                                    log = False

                        else:
                            print('验证码错误，请重新输入')
                            count += 1



            else:
                print('密码错误，请重新输入')
                continue