Event loop problem on Mac OS X

[avigan]

I am trying to run jupyter console on Mac OS X (10.13.1) after an install of Python using anaconda and I get an error that seems related to ipykernel:

[17:00] ~ > jupyter console
ERROR:tornado.application:Exception in callback functools.partial(<function wrap.<locals>.null_wrapper at 0x10b2d1400>)
Traceback (most recent call last):
  File "/Users/avigan/anaconda3/lib/python3.6/site-packages/tornado/ioloop.py", line 605, in _run_callback
    ret = callback()
  File "/Users/avigan/anaconda3/lib/python3.6/site-packages/tornado/stack_context.py", line 277, in null_wrapper
    return fn(*args, **kwargs)
  File "/Users/avigan/anaconda3/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 265, in enter_eventloop
    self.eventloop(self)
  File "/Users/avigan/anaconda3/lib/python3.6/site-packages/ipykernel/eventloops.py", line 277, in loop_cocoa
    show.mainloop()
AttributeError: 'function' object has no attribute 'mainloop'
Jupyter console 5.2.0

Python 3.6.3 |Anaconda custom (64-bit)| (default, Nov  8 2017, 18:10:31)
Type 'copyright', 'credits' or 'license' for more information
IPython 6.2.1 -- An enhanced Interactive Python. Type '?' for help.

In [1]:

It does open a prompt at the end, but the problem is that I get weird behaviours in GUIs (e.g. in matplotlib) started from this prompt.

Also it really seems specific to Mac OS X, because with the same install on linux I have not such issue and because of the loop_cocoa line at the end.

[cradesto]

The same problem on OSX with python 2

jupyter-console            
Jupyter console 5.2.0

Python 2.7.14 |Anaconda, Inc.| (default, Dec  7 2017, 11:07:58) 
Type "copyright", "credits" or "license" for more information.

IPython 5.4.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.



In [1]: %matplotlib
Using matplotlib backend: MacOSX
ERROR:tornado.application:Exception in callback <functools.partial object at 0x108bf0f70>
Traceback (most recent call last):
  File "/Users/marat/miniconda/envs/astro/lib/python2.7/site-packages/tornado/ioloop.py", line 605, in _run_callback
    ret = callback()
  File "/Users/marat/miniconda/envs/astro/lib/python2.7/site-packages/tornado/stack_context.py", line 277, in null_wrapper
    return fn(*args, **kwargs)
  File "/Users/marat/miniconda/envs/astro/lib/python2.7/site-packages/ipykernel/kernelbase.py", line 262, in enter_eventloop
    self.eventloop(self)
  File "/Users/marat/miniconda/envs/astro/lib/python2.7/site-packages/ipykernel/eventloops.py", line 278, in loop_cocoa
    show.mainloop()
AttributeError: 'function' object has no attribute 'mainloop'

[minrk]

This is a change in matplotlib 2.1. I'm just about to open a PR that will fix that for other reasons.