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IPython Console fails to start (An error ocurred while starting the kernel)
See original GitHub issueHi,
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(orpip, 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?
- Install Spyder in a fresh conda env with python 3.6 and conda-forge
- Run spyder
- 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)
Issue Analytics
- State:
- Created 5 years ago
- Comments:10 (2 by maintainers)
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Please downgrade to ipykernel 4.8.2 and try again.
use this command.
conda install -c anaconda spyder ipykernel=4.8.2
It works on my Windows laptop