Re-Direct print back to the Script Editor

[Aaron Carlisle]

I wrote a logging system that redefines XStream and directs stdout and stderr to a Qt window so that I can also log output to a file (selectively).

This broke the Python print statement and the output of that will no longer show up in Maya's script editor.

Is there a way to reset Maya's internal Python printing? They're obviously doing something in the API because it include line endings and coloring output, I'm just not sure how to re-initialize it.

Any input would helpful!!

Thanks!

[Robert White]

If you're on windows the following file is where the maya log handling stuff gets setup. Should be in a fairly similar place on other OSs

C:\Program Files\Autodesk\Maya2014\Python\Lib\site-packages\maya\utils.py

That should hopefully give you a starting point for how they're hooking into stdout/stderr and getting it to the script editor.
I honestly can't remember what I had done to get it logging to both a file and not interrupting the internal handler.

[Aaron Carlisle]

So that actually got me looking in the right area! Thanks Robert.

Here's the solution:

Since I was overwriting XStream and redefining stdout I needed to reset stdout to point to Maya's output, but where is that? Well, the hint was staring me in the face, I just needed to find it; the answer was in plogging.py (pymel's logging system. There's a function called _fixMayaOutput and they use it to reset their own logging system.

So...

import sys

from maya import utils

# redefine sys.stdout

sys.stdout = utils.Output

# in order to use stdout 'write' requires a 'maya.Output' so we flush it

class MayaOutput(sys.stdout):

    def flush(*args, **kwargs):

        utils.Output = MayaOutput()

        sys.stdout = utils.Output

# initialize

log = MayaOutput()

# and flush, we're back to feeding output to the script editor

log.flush()

print("Hello World")

Thanks for your help Robert!

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