Spyder ipython console throws "An error ocurred while starting the kernel" when restarting kernel

Description

When restarting ipython kernel or opening a new ipython console session within Spyder, it crashes. Below is the error message. However, the very first ipython console session that get’s opened by Spyder, does work. I have reinstalled anaconda with a fresh new download but the problem keeps appearing.

An error ocurred while starting the kernel
Error in sitecustomize; set PYTHONVERBOSE for traceback:
TypeError: 'NoneType' object is not callable
Traceback (most recent call last):
File "/Users/asierberra/anaconda/lib/python3.5/site‑packages/spyderlib/widgets/externalshell/start_ipython_kernel.py", line 183, in 
from IPython.kernel.zmq.kernelapp import IPKernelApp
File "/Users/asierberra/anaconda/lib/python3.5/site‑packages/IPython/__init__.py", line 48, in 
from .terminal.embed import embed
File "/Users/asierberra/anaconda/lib/python3.5/site‑packages/IPython/terminal/embed.py", line 16, in 
from IPython.core.interactiveshell import DummyMod
File "/Users/asierberra/anaconda/lib/python3.5/site‑packages/IPython/core/interactiveshell.py", line 31, in 
from pickleshare import PickleShareDB
File "/Users/asierberra/anaconda/lib/python3.5/site‑packages/pickleshare.py", line 41, in 
from path import path as Path
File "/Users/asierberra/anaconda/lib/python3.5/site‑packages/path.py", line 123, in 
__version__ = pkg_resources.require('path.py')[0].version
TypeError: 'NoneType' object is not callable

What steps will reproduce the problem?

1. Open spyder and work in ipython consol
2. Open a new ipython console tab, or restart current kernel

What is the expected output? What do you see instead?

Please provide any additional information below

Version and main components

• Spyder Version: 2.3.7
• Python Version: 3.5.0
• Qt Versions: 4.8.7, PyQt4 (API v2) 4.11.4 on Darwin
• OsX 10.11.1

Optional dependencies

pyflakes >=0.6.0   :  1.0.0 (OK)
pep8 >=0.6         :  1.6.2 (OK)
pygments >=1.6     :  2.0.2 (OK)
IPython >=1.0      :  4.0.0 (OK)
zmq >=2.1.11       :  14.7.0 (OK)
qtconsole >=4.0    :  4.1.0 (OK)
pandas >=0.13.1    :  0.17.0 (OK)
sphinx >=0.6.6     :  1.3.1 (OK)
psutil >=0.3       :  3.2.2 (OK)
rope >=0.9.2       :  0.9.4-1 (OK)
jedi >=0.8.1;<0.9.0:  0.9.0 (NOK)
matplotlib >=1.0   :  1.4.3 (OK)
sympy >=0.7.3      :  0.7.6.1 (OK)
pylint >=0.25      :  None (NOK)

[netoeuc]

Hi guys, the trick for me was: tools -> Reset Spyder to Factory Defaults

[ccordoba12]

Please try to run

conda update setuptools

to see if that fixes your problem.