day12 练习

#1、通用文件copy工具实现
file=input('原文件路径:')
c_file=input('目标文件文件路径:')
with open(r'{}'.format(file),mode='rb')as x,\
    open(r'{}'.format(c_file),mode='wb')as y:
    for z in x:
        print(z)
        y.write(z)

#2、基于seek控制指针移动，测试r+、w+、a+模式下的读写内容
with open(r'D:\cool\user2.txt',mode='r+',encoding='utf-8') as f:
    f.seek(5,0)
    print (f.read())
with open(r'D:\cool\user1.txt', mode='w+', encoding='utf-8') as f:
    f.write('321')
    f.seek(2,0)
    print(f.tell())
    f.write('啦啦啦')
with open(r'D:\cool\user2.txt',mode='a+',encoding='utf-8') as f:
    f.seek(4,0)
    f.write('哈哈')




#3、tail -f access.log程序实现
import time
with open('access.log',mode='rb') as f:
    f.seek(0,2)
    while 1:
        line=f.readline()
        if len(line) == 0:
            time.sleep(0.5)
        else:
            print(line.decode('utf-8'),end='')

#4、周末作业参考在老师讲解完毕后（下午17：30开始讲解），练习熟练，明早日考就靠他俩
# 4.1：编写用户登录接口
# 4.2：编写程序实现用户注册后（注册到文件中），可以登录（登录信息来自于文件）

tag = True
while tag :
    dic = {}
    with open(r'D:\cool\user', mode='rt', encoding='utf-8') as x:
        # print(x.read())
        for y in x:
            name, password, count = y.strip().split(':')
            dic[name] = [password, count]
            dic.get(name)[1] = int(dic.get(name)[1])
    cmd = input('--0 退出--1 登录--2 注册--\n请输入命令编号>>:')
    if cmd == '0':
        print('退出')
        break
    elif cmd == '1':
        while tag:
            inp_name = input('请输入您的用户名:')
            inp_pwd = input('请输入您的密码:')
            if inp_name in dic:
                if dic.get(inp_name)[1] >= 3:
                    print('该账户已锁定')
                    tag = False
                elif inp_pwd == dic.get(inp_name)[0]:
                    print('登录成功')
                    tag = False
                elif inp_pwd != dic.get(inp_name)[0]:
                    print('账号或密码 错误')
                    dic.get(inp_name)[1] += 1
                    print(f'用户名{inp_name} 已错误{dic.get(inp_name)[1]}次')
                    dic1 = str(dic)
                    z = dic1.strip("{}'[]").replace("': ['", ":").replace("', ", ":").replace("], '", "\n")
                    with open(r'D:\cool\user', mode='wt', encoding='utf-8') as a:
                        a.write(z)
                    if dic.get(inp_name)[1] == 3:
                        print('锁定')
                        tag = False
            else:
                print('用户名不存在\n返回    请按[2]\n退出    请按[0]')
                cmd2 = input('请输入命令编号>>:')
                if cmd2 == '2':
                    break
                elif cmd2 == '0':
                    print('退出')
                    tag = False
    elif cmd == '2':
        while tag:
            dic2 = {}
            with open(r'D:\cool\user',mode='rt',encoding='utf-8') as i:
                # print(x.read())
                for o in i:
                    name,password,count=o.strip().split(':')
                    dic2[name]=[password,count]
                    dic2.get(name)[1] = int(dic2.get(name)[1])
            inp_user = input('请输入您想注册的用户名:')
            inp_password = input('请输入你的注册密码:')
            inp_password2 = input('请再次输入你的注册密码:')
            # print(dic2)
            if inp_user in name:
                print('该用户名已被注册')
                break
            else:
                if inp_password == inp_password2:
                    with open(r'D:\cool\user', mode='at', encoding='utf-8') as z:
                        z.write(f'\n{inp_user}:{inp_password}:0')
                        print('注册成功')
                        break
                else:
                    print('注册密码有误\n请重新输入')

    else:
        print('命令编号有误\n请输入正确编号')