open a file for read / write

[Xx r3negade]

Sorry for the extreme newbie question, but I honestly can't find this anywhere else. When I do

f = open('/var/www/some_file', 'r+')

it is supposed to open the file for reading and writing, according to python's documentation. However, it appears to open the file for reading and appending instead. Is there any way I can open the file for reading and writing, without having to call the method twice?

[jlm699]

If you simply want to clear the contents all you need to do is use truncate. Truncate with no arguments truncates the file to the current position of the file pointer, so by doing:
[code=python]
fh.seek(0) # resets file pointer to beginning of file
fh.truncate() # truncates file contents
[/code]
That should clear out the contents of your file.