write a .txt file

[Jia Hu]

Hello:

I have a problem about how to generate a specific.txt file. I use the
following code:

#!/usr/bin/python
# OS: Ubuntu
import subprocess
fileName = open ('final.txt', 'a')
fileName.write ('%s %s %s \n' % (12,25,9))
desLrr = subprocess.Popen('echo "hello" >> final.txt ', shell=True)

fileName.seek(0,2)
fileName.write ('%s %s %s \n' % (85,25,12))
fileName.close()

The above code generates the following result:
12 25 9
85 25 12
hello

What I want is:
12 25 9
hello
85 25 12

Could someone provies some suggestions about this problem?

Thank you.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20100712/40b5eee8/attachment.html>