day13 练习

# 1、编写文件修改功能，调用函数时，传入三个参数（修改的文件路径，要修改的内容，修改后的内容）既可完成文件的修改

def file_change(path,file,c_file):
    with open(path,mode='rb')as f:
        x=f.read().replace(file,c_file)
    with open(path,mode='wb')as f1:
        f1.write(x)



# 2、编写tail工具

def tail(path):
    import time
    with open(path,mode='rb')as f:
        f.seek(0,2)
        while 1:
            x=f.readline()
            if len(x)==0:
                time.sleep(0.6)
            else:
                print(x.decode('utf-8'),end='')


# 3、编写登录功能

def login(dic,tag):
    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':
                continue
            elif cmd2 == '0':
                print('退出')
                tag = False


# 4、编写注册功能
def registered(tag):
    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 dic2:
            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')