文件操作[2]

1 #可读可写：r+  写的内容在文件内容的尾部
2 
3 f = open(‘file2‘,‘r+‘,encoding=‘utf-8‘)
4 for i in range(3):
5     print(f.readline())
6 f.write(‘--------------------------233-------------------------------‘)

 1 # 写读模式：w+
 2 f = open(‘file3‘,‘w+‘,encoding=‘utf-8‘)
 3 for i in range(3):
 4     f.write(‘------------0---------go!\n‘)
 5 print(f.tell())
 6 f.seek(10)
 7 print(f.tell())
 8 f.write(‘This is is is is is so good!‘)
 9 print(f.readlines())
10 f.close()

1 f = open(‘file5‘,‘a+‘,encoding=‘utf-8‘)
2 for i in range(5):
3     f.write(‘1------------------------go!\n‘)
4 print(f.tell())
5 f.seek(10)
6 print(f.tell())
7 f.write(‘-----------------end--------------------‘)
8 print(f.readlines())

1 #二进制文件的读 ：rb
2 f = open(‘file5‘,‘ab‘) #rb wb ab
3 print(f.readlines())
4 #二进制文件的写 ：wb
5 f.write("oracle or mysql\n".encode())
6 #二进制文件的追加 ：ab
7 f.write(‘\ngood‘.encode())