The following code in Python 2.3
f = file('t.txt', 'wt')
f.write('\n')
f.close()

writes
0D0A to the file.

Is this a bug or expected behavior?
It sure took me by surprise.

If it is not a bug, is this behavior documented?

jcb@iteris.com wrote:
[color=blue]
> ...
> 0D0A to the file.
>
> Is this a bug or expected behavior?
> It sure took me by surprise.[/color]

You're running Windows, right? Then, this is expected behaviour, as Windows
treats text and binary files different, extending \n to \r\n (as that is
the Windows end of line marker).

If you want to only write \n to the file, use:

f = file("t.txt","wb")

....

windows-line-feeds-are-from-hell'ly yours,
--- Heiko.

Thanks much.

Yes, I am using Windows.