Python debuggers with sys.settrace()

[Chris Rebert]

On Thu, May 6, 2010 at 5:59 AM, Sarah Mount <mount.sarah at gmail.com> wrote:
> 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.....

You could monkeypatch the socket constructors in the `socket` module
to return dummies.

Cheers,
Chris
--
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