Maya Python: IOError: [Errno 9] Bad file descriptor

Question

I created a maya python toolchain for my team. All works well, just on one machine i seem to have problems. I narrowed it down to the print command. Like this test library called "temp.py":

import os
# from pymel.core import *

print "Hello"

after importing it with

import temp

it produces this output (only on that one computer!):

// Error: 9
# Traceback (most recent call last):
# File "<maya console>", line 1, in <module>
# File "C:\maya_scripts\temp.py", line 4, in <module>
# print "Hello"
# IOError: [Errno 9] Bad file descriptor //

I've tried Maya Version 2016, 2016.5 and 2017 . All the same result. Python 2.5 as standalone hasn't got that problem. To me that sounds like some kind of configuration problem, but then again it behaves the same over 3 different maya installations, so deleting the prefs didn't help either.

Answer 1

It's hard to know what's really happening here. But try this

import sys
sys.__stdout__.write("hello")
 sys.__stdout__.write(str(sys.stdout))

Then check your output window ( not the listener). In a vanilla maya you'd expect to see something like

<maya.Output object at 0x00000217E827FC10>

after "hello". If you see something else, some script has tried to hijack sys.stdout in this installation. You can probably work around it by creating an environment variable called MAYA_SKIP_USERSETUP_PY , setting it to 1 , and restarting -- that should stop whatever script is being naughty from autoloading.

This ought to reset it to what you're looking for:

 import maya.utils as utils
 sys.stdout = utils.Output()

However you need to comb through the scripts on that machine and find out who is messing with sys.stdout behind your back

Answer 2

The error is from your module, you may overwrite the print function

maya 2016 is python 2.7.6 and maya 2017 is in python 3.x on 2017 you must use print("")