sys.stdout.detach() results in ValueError

Dave Angel d at
Wed Mar 7 23:14:35 CET 2012

On 03/07/2012 02:41 PM, Peter Kleiweg wrote:
> I want to write out some binary data to stdout in Python3. I
> thought the way to do this was to call detach on sys.stdout. But
> apparently, you can't. Here is a minimal script:
>      #!/usr/bin/env python3.1
>      import sys
>      fp = sys.stdout.detach()
> Not yet using fp in any way, this script gives the following error:
>      Exception ValueError: 'underlying buffer has been detached' in
> Same in Python 3.1.4 and Python 3.2.2
> So, what do I do if I want to send binary data to stdout?

sys.stdout.write(  some_binary_data )

Why should you need to do some funny manipulation?

If you have some other unstated motivation, better ask a clearer question.



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