python的文件读写问题？

Question

file_object = open(r"/root/py_test/web01/src/ftime",'rw')
try:
    print file_object.read()
    file_object.write('test')
finally:
    file_object.close( )

读取一个文件，内容就一行
然后再写入，报错。

IOError
IOError: [Errno 9] Bad file descriptor

什么情况呢？

Answer 1

Your python version should be 2.X, right? Please try changing 'rw' in the permissions section to 'r+'

Answer 2

As long as you bring the + sign, you will have various permissions.

Answer 3

rw cannot be recognized. If you want to have both read and write permissions, you can change it to ab+

Answer 4

It is recommended to use with to improve code readability