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IPython Console fails to start (An error ocurred while starting the kernel) #7821

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Lewn opened this issue Sep 3, 2018 · 10 comments
Closed
9 of 10 tasks

IPython Console fails to start (An error ocurred while starting the kernel) #7821

Lewn opened this issue Sep 3, 2018 · 10 comments
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status:Awaiting Followup

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@Lewn
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Lewn commented Sep 3, 2018 •
edited

Hi,

After installing a clean installation of spyder on Windows, the IPython console fails to start.

note: I am using the conda-forge channel

> conda update conda
output skipped, update successfull
>type spydertest.yaml
name: spydertest
channels:
  - conda-forge
dependencies:
  - python=3.6
  - spyder
> conda env create -f spydertest.yaml
output skipped, install successfull
>conda activate spydertest
>conda list
# packages in environment at C:\ProgramData\Miniconda3\envs\spydertest:
#
# Name                    Version                   Build  Channel
alabaster                 0.7.11                     py_3    conda-forge
asn1crypto                0.24.0                   py36_3    conda-forge
astroid                   2.0.2                    py36_0    conda-forge
babel                     2.6.0                      py_1    conda-forge
backcall                  0.1.0                      py_0    conda-forge
bleach                    2.1.4                      py_1    conda-forge
ca-certificates           2018.8.24            ha4d7672_0    conda-forge
certifi                   2018.8.24                py36_0    conda-forge
cffi                      1.11.5           py36hfa6e2cd_1    conda-forge
chardet                   3.0.4                    py36_3    conda-forge
cloudpickle               0.5.5                      py_0    conda-forge
colorama                  0.3.9                      py_1    conda-forge
cryptography              2.3.1            py36h74b6da3_0    conda-forge
cryptography-vectors      2.3.1                    py36_0    conda-forge
decorator                 4.3.0                      py_0    conda-forge
docutils                  0.14                     py36_1    conda-forge
entrypoints               0.2.3                    py36_2    conda-forge
html5lib                  1.0.1                      py_0    conda-forge
icu                       58.2                     vc14_0  [vc14]  conda-forge
idna                      2.7                      py36_2    conda-forge
imagesize                 1.1.0                      py_0    conda-forge
ipykernel                 4.9.0                    py36_0    conda-forge
ipython                   6.5.0                    py36_0    conda-forge
ipython_genutils          0.2.0                      py_1    conda-forge
isort                     4.3.4                    py36_0    conda-forge
jedi                      0.12.1                   py36_0    conda-forge
jinja2                    2.10                       py_1    conda-forge
jpeg                      9b                       vc14_2  [vc14]  conda-forge
jsonschema                2.6.0                    py36_2    conda-forge
jupyter_client            5.2.3                      py_1    conda-forge
jupyter_core              4.4.0                      py_0    conda-forge
keyring                   13.2.1                   py36_0    conda-forge
lazy-object-proxy         1.3.1            py36hfa6e2cd_0    conda-forge
libpng                    1.6.34                   vc14_0  [vc14]  conda-forge
libsodium                 1.0.16                   vc14_0  [vc14]  conda-forge
markupsafe                1.0              py36hfa6e2cd_1    conda-forge
mccabe                    0.6.1                      py_1    conda-forge
mistune                   0.8.3            py36hfa6e2cd_2    conda-forge
nbconvert                 5.3.1                      py_1    conda-forge
nbformat                  4.4.0                      py_1    conda-forge
numpydoc                  0.8.0                      py_1    conda-forge
openssl                   1.0.2o                   vc14_0  [vc14]  conda-forge
packaging                 17.1                       py_0    conda-forge
pandoc                    2.2.2                hde52d81_1    conda-forge
pandocfilters             1.4.2                      py_1    conda-forge
parso                     0.3.1                      py_0    conda-forge
pickleshare               0.7.4                    py36_0    conda-forge
pip                       18.0                     py36_1    conda-forge
prompt_toolkit            1.0.15                     py_1    conda-forge
psutil                    5.4.7            py36hfa6e2cd_1    conda-forge
pycodestyle               2.4.0                      py_1    conda-forge
pycparser                 2.18                       py_1    conda-forge
pyflakes                  2.0.0                      py_0    conda-forge
pygments                  2.2.0                      py_1    conda-forge
pylint                    2.1.1                    py36_0    conda-forge
pyopenssl                 18.0.0                   py36_0    conda-forge
pyparsing                 2.2.0                      py_1    conda-forge
pyqt                      5.6.0            py36h764d66f_7    conda-forge
pysocks                   1.6.8                    py36_2    conda-forge
python                    3.6.6                he025d50_0    conda-forge
python-dateutil           2.7.3                      py_0    conda-forge
pytz                      2018.5                     py_0    conda-forge
pywin32-ctypes            0.2.0                    py36_0    conda-forge
pyzmq                     17.1.2           py36hf576995_0    conda-forge
qt                        5.6.2                    vc14_1  [vc14]  conda-forge
qtawesome                 0.4.4              pyh8a2030e_1    conda-forge
qtconsole                 4.4.1                    py36_1    conda-forge
qtpy                      1.5.0              pyh8a2030e_0    conda-forge
requests                  2.19.1                   py36_1    conda-forge
rope                      0.10.7                     py_1    conda-forge
setuptools                40.2.0                   py36_0    conda-forge
simplegeneric             0.8.1                      py_1    conda-forge
sip                       4.18.1           py36h6538335_0    conda-forge
six                       1.11.0                   py36_1    conda-forge
snowballstemmer           1.2.1                      py_1    conda-forge
sphinx                    1.7.8                    py36_0    conda-forge
sphinxcontrib-websupport  1.1.0                      py_1    conda-forge
spyder                    3.3.1                    py36_1    conda-forge
spyder-kernels            0.2.6                      py_0    conda-forge
testpath                  0.3.1                    py36_1    conda-forge
tornado                   5.1              py36hfa6e2cd_1    conda-forge
traitlets                 4.3.2                    py36_0    conda-forge
typed-ast                 1.1.0                    py36_0    conda-forge
urllib3                   1.23                     py36_1    conda-forge
vc                        14                            0    conda-forge
vs2015_runtime            14.0.25420                    0    conda-forge
wcwidth                   0.1.7                      py_1    conda-forge
webencodings              0.5.1                      py_1    conda-forge
wheel                     0.31.1                   py36_1    conda-forge
win_inet_pton             1.0.1                    py36_2    conda-forge
wincertstore              0.2                      py36_2    conda-forge
wrapt                     1.10.11                  py36_0    conda-forge
zeromq                    4.2.5                    vc14_2  [vc14]  conda-forge
zlib                      1.2.11                   vc14_0  [vc14]  conda-forge

>ipython
Python 3.6.6 | packaged by conda-forge | (default, Jul 26 2018, 11:48:23) [MSC v.1900 64 bit (AMD64)]
Type 'copyright', 'credits' or 'license' for more information
IPython 6.5.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: 1
Out[1]: 1

In [2]: exit

> spyder

Now spyder starts up nicely, but the iPython console does not start, and gives the following traceback:

Traceback (most recent call last):
File "C:\ProgramData\Miniconda3\envs\spydertest\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "C:\ProgramData\Miniconda3\envs\spydertest\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\ProgramData\Miniconda3\envs\spydertest\lib\site‑packages\spyder_kernels\console\__main__.py", line 11, in 
start.main()
File "C:\ProgramData\Miniconda3\envs\spydertest\lib\site‑packages\spyder_kernels\console\start.py", line 284, in main
kernel.initialize()
File "", line 2, in initialize
File "C:\ProgramData\Miniconda3\envs\spydertest\lib\site‑packages\traitlets\config\application.py", line 87, in catch_config_error
return method(app, *args, **kwargs)
File "C:\ProgramData\Miniconda3\envs\spydertest\lib\site‑packages\ipykernel\kernelapp.py", line 474, in initialize
self.init_io()
File "C:\ProgramData\Miniconda3\envs\spydertest\lib\site‑packages\ipykernel\kernelapp.py", line 326, in init_io
sys.stdout.flush()
AttributeError: 'NoneType' object has no attribute 'flush'

Issue Report Checklist

  • Searched the issues page for similar reports
  • Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
  • Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
  • Could not reproduce inside jupyter qtconsole (if console-related)
  • Tried basic troubleshooting (if a bug/error)
    • Restarted Spyder
    • Reset preferences with spyder --reset
    • Reinstalled the latest version of Anaconda
    • Tried the other applicable steps from the Troubleshooting Guide
  • Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

When starting Spyder, the Ipython console fails to start. A raw ipython console will start correctly from the command line, as well as a jupyter qtconsole.

What steps reproduce the problem?

  1. Install Spyder in a fresh conda env with python 3.6 and conda-forge
  2. Run spyder
  3. No Ipython console :(

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

Wanted: A working Ipython console
Got: An error ocurred while starting the kernel

Paste Traceback/Error Below (if applicable)

Also see above

>>> WARNING:traitlets:kernel restarted
WARNING:traitlets:kernel restarted
WARNING:traitlets:kernel restarted
WARNING:traitlets:kernel restarted
WARNING:traitlets:KernelRestarter: restart failed
WARNING:traitlets:kernel died: 18.001529455184937

Versions

  • Spyder version: 3.3.1
  • Python version: 3.6.6
  • Qt version: 5.6.2
  • PyQt version: 5.6.0
  • Operating System name/version: Windows 10

Dependencies

IPython >=4.0     :  6.5.0 (OK)
cython >=0.21     :  None (NOK)
jedi >=0.9.0      :  0.12.1 (OK)
matplotlib >=2.0.0:  None (NOK)
nbconvert >=4.0   :  5.3.1 (OK)
numpy >=1.7       :  None (NOK)
pandas >=0.13.1   :  None (NOK)
pycodestyle >=2.3 :  2.4.0 (OK)
pyflakes >=0.6.0  :  2.0.0 (OK)
pygments >=2.0    :  2.2.0 (OK)
pylint >=0.25     :  2.1.1 (OK)
qtconsole >=4.2.0 :  4.4.1 (OK)
rope >=0.9.4      :  0.10.7 (OK)
sphinx >=0.6.6    :  1.7.8 (OK)
sympy >=0.7.3     :  None (NOK)
@ccordoba12
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Please downgrade to ipykernel 4.8.2 and try again.

@Lewn
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Lewn commented Sep 4, 2018

With IPykernel 4.8.2 it works again! Thank you very much.
Does this need to be added to the dependencies somewhere?

@ccordoba12
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We're waiting for 4.9.1 to be released.

@wl935
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wl935 commented Sep 4, 2018

Many thanks! @ccordoba12
Problem solved!

@Lewn Lewn mentioned this issue Sep 5, 2018
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@jeanbaptisteb
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jeanbaptisteb commented Sep 10, 2018 •
edited

For the record, I had the exact same issue, but downgrading to IPykernel 4.8.2 didn't work right away.
I had to reset preferences with spyder --reset after the downgrade; then it worked.

@liangbright
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use this command.

conda install -c anaconda spyder ipykernel=4.8.2

It works on my Windows laptop

@hmaarrfk hmaarrfk mentioned this issue Sep 25, 2018
Closed
5 tasks
@mayurpande mayurpande mentioned this issue Sep 27, 2018
Closed
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@Twizzledrizzle
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conda update ipykernel works for me (installed ipykernel 5.0)

@ralphcastro504
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Thanks @ccordoba12 downgrading solved my problem too.

@gauravmandhotra
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Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\runpy.py", line 193, in run_module_as_main
"main", mod_spec)
File "C:\ProgramData\Anaconda3\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "C:\ProgramData\Anaconda3\lib\site‑packages\spyder_kernels\console_main.py", line 11, in
start.main()
File "C:\ProgramData\Anaconda3\lib\site‑packages\spyder_kernels\console\start.py", line 279, in main
import_spydercustomize()
File "C:\ProgramData\Anaconda3\lib\site‑packages\spyder_kernels\console\start.py", line 39, in import_spydercustomize
import spydercustomize
File "C:\ProgramData\Anaconda3\lib\site‑packages\spyder_kernels\customize\spydercustomize.py", line 27, in
from IPython.core.getipython import get_ipython
File "C:\ProgramData\Anaconda3\lib\site‑packages\IPython_init.py", line 54, in
from .core.application import Application
File "C:\ProgramData\Anaconda3\lib\site‑packages\IPython\core\application.py", line 23, in
from traitlets.config.application import Application, catch_config_error
File "C:\ProgramData\Anaconda3\lib\site‑packages\traitlets\config_init_.py", line 6, in
from .application import *
File "C:\ProgramData\Anaconda3\lib\site‑packages\traitlets\config\application.py", line 120, in
class Application(SingletonConfigurable):
File "C:\ProgramData\Anaconda3\lib\site‑packages\traitlets\config\application.py", line 291, in Application
def initialize(self, argv=None):
TypeError: wropper_functin() takes 0 positional arguments but 1 was givenTraceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\runpy.py", line 193, in run_module_as_main
"main", mod_spec)
File "C:\ProgramData\Anaconda3\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "C:\ProgramData\Anaconda3\lib\site‑packages\spyder_kernels\console_main.py", line 11, in
start.main()
File "C:\ProgramData\Anaconda3\lib\site‑packages\spyder_kernels\console\start.py", line 279, in main
import_spydercustomize()
File "C:\ProgramData\Anaconda3\lib\site‑packages\spyder_kernels\console\start.py", line 39, in import_spydercustomize
import spydercustomize
File "C:\ProgramData\Anaconda3\lib\site‑packages\spyder_kernels\customize\spydercustomize.py", line 27, in
from IPython.core.getipython import get_ipython
File "C:\ProgramData\Anaconda3\lib\site‑packages\IPython_init.py", line 54, in
from .core.application import Application
File "C:\ProgramData\Anaconda3\lib\site‑packages\IPython\core\application.py", line 23, in
from traitlets.config.application import Application, catch_config_error
File "C:\ProgramData\Anaconda3\lib\site‑packages\traitlets\config_init_.py", line 6, in
from .application import *
File "C:\ProgramData\Anaconda3\lib\site‑packages\traitlets\config\application.py", line 120, in
class Application(SingletonConfigurable):
File "C:\ProgramData\Anaconda3\lib\site‑packages\traitlets\config\application.py", line 291, in Application
def initialize(self, argv=None):
TypeError: wropper_functin() takes 0 positional arguments but 1 was given

@gauravmandhotra
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how can I solve this error.when I fixed it one time and after reopen my spyder it show me this error again
can you give any solution of this erroe

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8 participants
@ccordoba12 @Lewn @liangbright @jeanbaptisteb @Twizzledrizzle @wl935 @ralphcastro504 @gauravmandhotra