Python debuggers with sys.settrace()

[Sarah Mount]

On 5 May 2010 10:17, Carl Banks <pavlovevidence at gmail.com> wrote:
> On May 2, 11:06 am, Sarah Mount <mount.sa... at gmail.com> wrote:
>> This is a bit of an odd question, but is there any way for a Python
>> debugger to suppress I/O generated by the program which is being
>> debugged? I guess an "obvious" thing to do would be to replace core
>> parts of the standard library and change any relevant imports in the
>> locals and globals dicts to fake ones which don't generate I/O, but
>> this seems brittle as the standard library will change over time. Is
>> it possible to modify the byte-compiled code in each stack frame? Or
>> is there a simpler way to do this?
>
> It's not foolproof but you could try to reassign sys.stdout and
> sys.stderr to a bit bucket ("sys.stdout = open(os.devull)"), then
> invoke the debugger with stdout set to sys._stdout (the actual
> stdout).  You'll have to create the Pdb() by hand since the built-in
> convience functions don't do it.  Check the file pdb.py for details.
>

Thanks Carl. I had considered this, but it won't catch things like
socket communication. Hmmm.....

Cheers,

Sarah

-- 
Sarah Mount, Senior Lecturer, University of Wolverhampton
website:  http://www.snim2.org/
twitter: @snim2