1.文件操作

   模特主妇护士老师.txt

  1.文件路径：d:\ 模特主妇护士老师.txt

  2.编码方式：utf-8

  3.操作方式：只读，只写，追加，读写，写读

  以什么编码方式储存的，就必须以什么编码方式打开

  只读：#bytes——>str

    # f=open('gcs',mode = 'r',encoding = 'utf-8')

    # content = f.read()

    # print(content)

    # f.close()

    #rb 是bytes(非文字文件)

    f=open('gcs',mode = 'rb')

    content = f.read()

    print(content,type(content))

    f.close()

    #只写：

    #对于写，没有此文件就会创建文件

    # f=open('log',mode = 'w',encoding = 'utf-8')

    # f.write('秀秀秀秀')

    # f.close()

    #先将源文件的内容全部清除，在写

    # f=open('log',mode = 'w',encoding = 'utf-8')

    # f.write('秀顺')

    # f.close()

    #wb bytes

    # f=open('log',mode = 'wb')

    # f.write('秀顺'.encode('utf-8'))

    # f.close()

    #追加：

    # f=open('log',mode = 'a',encoding='utf-8')

    # f.write('在一起')

    # f.close()

    f=open('log',mode = 'ab')

    f.write('可以吗'.encode('utf-8'))

    f.close()

    #读写，先读出内容，在写入

    # f= open('log',mode='r+',encoding='utf-8')

    # print(f.read())

    # f.write('祝您们幸福')

    # f.close()

    #读写的 bytes

    f= open('log',mode='r+b')

    print(f.read())

    f.write(''.encode('utf-8'))

    f.close()

 #功能详解

 f=open('gcs',mode = 'r+',encoding = 'utf-8')

 # content = f.read(3)#读出来的都是字符

 # f.seek(3)#按字节定光标的位置

 #f.tell() #告诉你光标位置

 # f.readable()#可读的

 # line=f.readline()#一行一行的读

 # line=f.readlines()#每一行当成列表中的一个元素，添加到列表list

 # f.truncate(3)#在源文件截取

 # print(line)

 # for line in f:

 #     print(line)

 # f.close()

 # count=f.tell()

 # f.seek(count-9)

 # content = f.read(2)

 # print(content)

 # f.close()

 # with open('gcs',mode = 'r+',encoding = 'utf-8') as obj:

 #     # obj.read()

 #     print(obj.read())

 with open('gcs', mode='r+', encoding='utf-8') as obj,\

         open('log', mode='r+', encoding='utf-8') as f1:

         # obj.read()

     print(obj.read())

     print(f1.read())

  #str --->byte  encode 编码

 # s = '二哥'

 # b = s.encode('utf-8')

 # print(b)

 # #byte --->str decode 解码

 # s1 = b.decode('utf-8')

 # print(s1)

 # s = 'abf'

 # b = s.encode('utf-8')

 # print(b)

 # #byte --->str decode 解码

 # s1 = b.decode('gbk')

 # print(s1)

 username = input('请输入账户名：')

 passward = input('请输入密码：')

 with open('f1', mode='w', encoding='utf-8') as obj:

     obj.write('{}\n{}'.format(username,passward))

 print('恭喜您，注册成功！')

 lis = []

 i = 0

 while i < 3:

     usn = input("请输入用户名：")

     pwd = input('请输入密码：')

     with open('f1', mode='r+', encoding='utf-8') as obj:

         for line in obj:

             lis.append(line)

     if usn == lis[0].strip() and  pwd == lis[1].strip():

         print('登录成功！')

         break

     else:

         print('账号和密码错误！')

     i+=1