# 1. 打开文件拿到文件对象(文件对象====>操作系统打开文件====>硬盘)

# f=open(r'文件的路径',mode='文件的打开模式',encoding='字符编码') #绝对路径:C:\a\b\c.txt,/a/b/c/c.txt 相对路径:相对于当前执行文件所在的文件夹为起始点进行查找b/c/a.txt

# 2. 操作文件:读/写

# f.read()

# f.readlines()

# f.readline()

# f.readable()

# 3. 向操作系统发送指令关闭文件,回收操作系统资源

# f.close()

with open(r'D:\project\test\今日内容',mode='rt',encoding='utf-8') as f:

    # data=f.read()

    # print(data)

    # print('='*100)

        name=input('>>: ')

        for line in f:

            print(line)

# 打开文件的模式有三种纯净模式:r(默认的) w a

# 控制操作文件内容格式的两种模式:t(默认的) b

# 大前提: tb模式均不能单独使用,必须与纯净模式结合使用

# t文本模式:

#   1. 读写文件都是以字符串为单位的

#   2. 只能针对文本文件

#   3. 必须指定encoding参数

# b二进制模式:

#   1.读写文件都是以bytes/二进制为单位的

#   2. 可以针对所有文件

#   3. 一定不能指定encoding参数

with open('a.txt',mode='rt',encoding='utf-8') as f:

    print(f.readlines())

# 用户认证功能

inp_name=input('请输入你的名字: ').strip()

inp_pwd=input('请输入你的密码: ').strip()

with open(r'db.txt',mode='rt',encoding='utf-8') as f:

    for line in f:

        # 把用户输入的名字与密码与读出内容做比对

        u,p=line.strip('\n').split(':')

        if inp_name == u and inp_pwd == p:

            print('登录成功')

            break

    else:

        print('账号名或者密码错误')

# with open('b.txt',mode='wt',encoding='utf-8') as f:

    # print(f.writable())

    # print(f.readable())

    # f.write('你好\n')

    # f.write('我好\n') # 强调:在文件不关闭的清空下,后写的内容一定跟着前写内容的后面

    # f.write('大家好\n')

    # f.write('111\n222\n333\n')

    # lines=['1111','22222','33333']

    # for line in lines:

    #     f.write(line)

    # f.writelines(lines)

# 注册功能:

# name=input('username>>>: ').strip()

# pwd=input('password>>>: ').strip()

# with open('db1.txt',mode='at',encoding='utf-8') as f:

#     info='%s:%s\n' %(name,pwd)

#     f.write(info)

# with open('c.txt',mode='at',encoding='utf-8') as f:

    # f.write('44444\n')

    # f.write('55555\n')

    # print(f.readable())

    # print(f.writable())

# r+ w+ a+

# with open('a.txt',mode='r+t',encoding='utf-8') as f:

    # print(f.readable())

    # print(f.writable())

    # print(f.readline())

    # f.write('你好啊')

# b: 读写都是以二进制位单位

# with open('b.txt',mode='rb') as f:

#     data=f.read()

#     # print(data,type(data))

#     print(data.decode('utf-8'))

# with open('1.png',mode='rb') as f:

#     data=f.read()

#     print(data)

# with open('d.txt','wb') as f:

#     f.write('你好'.encode('gbk'))

# with open('1.png',mode='rb') as f:

#     data=f.read()

#

# with open('2.png',mode='wb') as f:

#     f.write(data)

src_file=input('源文件路径: ').strip()

dst_file=input('目标文件路径: ').strip()

with open(r'%s' %src_file,mode='rb') as read_f,open(r'%s' %dst_file,mode='wb') as write_f:

    for line in read_f:

        # print(line)

        write_f.write(line)