qtconsole breaks doctest.testmod() in Python 3.3

[onesandzeroes]

Ipython version: 0.13.1

Python version: Python 3.3.0 (default, Mar 8 2013, 07:01:05)

When using the qtconsole, I don't seem to be able to use doctest.testmod(), as I get errors about how "'OutStream' object has no attribute 'encoding'". To demonstrate the problem, I created doctest_example.py:

def my_function(x, y):
    """
    Adds x and y

    >>> my_function(3, 5)
    8
    """
    return x + y

if __name__ == '__main__':
    import doctest
    doctest.testmod()

Running this with %run doctest_example.py in the QtConsole results in the error message:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
/usr/lib/python3/dist-packages/IPython/utils/py3compat.py in execfile(fname, glob, loc)
     74     def execfile(fname, glob, loc=None):
     75         loc = loc if (loc is not None) else glob
---> 76         exec(compile(open(fname, 'rb').read(), fname, 'exec'), glob, loc)
     77 
     78     # Refactor print statements in doctests.

/home/marius/Programming/NLP/Assignment2/doctest_example.py in <module>()
     10 if __name__ == '__main__':
     11     import doctest
---> 12     doctest.testmod()

/usr/lib/python3.3/doctest.py in testmod(m, name, globs, verbose, report, optionflags, extraglobs, raise_on_error, exclude_empty)
   1904 
   1905     for test in finder.find(m, name, globs=globs, extraglobs=extraglobs):
-> 1906         runner.run(test)
   1907 
   1908     if report:

/usr/lib/python3/dist-packages/IPython/utils/doctestreload.py in f(*a, **k)
     35         sys.displayhook = sys.__displayhook__
     36         try:
---> 37             out = func(*a,**k)
     38         finally:
     39             sys.displayhook = dhook_s

/usr/lib/python3.3/doctest.py in run(self, test, compileflags, out, clear_globs)
   1398         save_stdout = sys.stdout
   1399         if out is None:
-> 1400             encoding = save_stdout.encoding
   1401             if encoding is None or encoding.lower() == 'utf-8':
   1402                 out = save_stdout.write

AttributeError: 'OutStream' object has no attribute 'encoding'

The error doesn't seem to go away when toggling %doctest_mode.

[minrk]

Should be fixed by #2500, which has been backported to 0.13.2, which should be out soon.