如何使用python打开文件进行读写？ Ubuntu服务器

Question

What I want to do is edit the etc/samba/smb.conf and I want to add

[Test's Files]
 comment = Test's Files
 path = /files/test
 browsable = yes
 read only = no
 valid users = test

all of this via a Python web application that recieves information from the user's input. For now I just want to know how I would add that piece of text to the file with python.

Answer 1

You can use the open() function in python to obtain a file:

with open('path/to/file', 'w') as output_file:
   output_file.write('content')

The second parameter to the open command is the mode. More details can be found on the Python documentation website . Side note: if this is in /etc/, then your application may need special permissions to be able to write to this file. To limit the potential danger of elevated privileges, you should create a subprocess with the elevated permissions that does nothing but write this file so that your main process has normal permissions.

Answer 2

You can look into SMBCOnnection module in python. http://pythonhosted.org/pysmb/api/smb_SMBConnection.html

I have already worked with it is a great module to work with smb server.

with open('path to file', 'w') as fileobj: fileobj.write('text to be written')

the above peice of code is very hand to open, write.And close a file implicitly performing opening and closing operations

Answer 3

You can do that in this simple way:

with open('/etc/whatever.txt', 'a+') as file:
    file.write("""[Test's Files]
comment = Test's Files
path = /files/test
browsable = yes
read only = no
valid users = test""")

But you need to pay attention to the permissions if you want to edit files that only root can write. Please, pay attention to the mode how you open the file! This must be 'a+' and NOT 'w' as it is shown in other answers! Otherwise you will overwrite the file!