Missing spyder‑kernels -- reinstalling to no avail

Issue Report Checklist

• [ x] Searched the issues page for similar reports Issue #7842 is very similar.
• [ x] Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
• [ x] Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
• [x ] Tried basic troubleshooting (if a bug/error)
  • [x ] Restarted Spyder
  • [ x] Reset preferences with spyder --reset
  • [ x] Reinstalled the latest version of Anaconda
  • [x ] Tried the other applicable steps from the Troubleshooting Guide
• [ x] Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

I am getting following after having reinstalled spyder‑kernels in the appropriate environment. The spyder and python interpreter are also is in the same environment

Your Python environment or installation doesn't have the spyder‑kernels module or the right version of it installed (>= 1.9.1 and < 1.10.0). Without this module is not possible for Spyder to create a console for you.
...

What steps reproduce the problem?

1. Install spyder in the base conda environment on Ubuntu 18, Python 3.7 / conda
2. Install spyder in another non-base conda environment per this instruction
3. Start Spyder

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

working console

Paste Traceback/Error Below (if applicable)

QXcbClipboard: SelectionRequest too old
QXcbClipboard: SelectionRequest too old
QXcbClipboard: SelectionRequest too old

Versions

Python 3.7.7 64-bit | Qt 5.9.6 | PyQt5 5.9.2 | Linux 5.3.0-51-generic

Dependencies

# Mandatory:
atomicwrites >=1.2.0           :  1.4.0 (OK)
chardet >=2.0.0                :  3.0.4 (OK)
cloudpickle >=0.5.0            :  1.4.1 (OK)
diff_match_patch >=20181111    :  20181111 (OK)
intervaltree                   :  None (OK)
IPython >=4.0                  :  7.13.0 (OK)
jedi =0.15.2                   :  0.15.2 (OK)
keyring                        :  None (OK)
nbconvert >=4.0                :  5.6.1 (OK)
numpydoc >=0.6.0               :  0.9.2 (OK)
parso =0.5.2                   :  0.5.2 (OK)
pexpect >=4.4.0                :  4.8.0 (OK)
pickleshare >=0.4              :  0.7.5 (OK)
psutil >=5.3                   :  5.7.0 (OK)
pygments >=2.0                 :  2.6.1 (OK)
pylint >=0.25                  :  2.5.0 (OK)
pyls >=0.31.9;<0.32.0          :  0.31.10 (OK)
qdarkstyle >=2.8               :  2.8.1 (OK)
qtawesome >=0.5.7              :  0.7.0 (OK)
qtconsole >=4.6.0              :  4.7.3 (OK)
qtpy >=1.5.0                   :  1.9.0 (OK)
rtree >=0.8.3                  :  0.9.4 (OK)
sphinx >=0.6.6                 :  3.0.3 (OK)
spyder_kernels >=1.9.1;<1.10.0 :  1.9.1 (OK)
watchdog                       :  None (OK)
xdg >=0.26                     :  0.26 (OK)
zmq >=17                       :  18.1.1 (OK)

# Optional:
cython >=0.21                  :  None (OK)
matplotlib >=2.0.0             :  3.1.3 (OK)
numpy >=1.7                    :  1.18.3 (OK)
pandas >=0.13.1                :  1.0.3 (OK)
scipy >=0.17.0                 :  None (OK)
sympy >=0.7.3                  :  None (OK)

[jimmy3142]

Thanks for your reply @dalthviz.

I was using a custom path linking to Python version 3.8 so that I could use that version of Python from within the Spyder console, as the default version with Spyder appears to be 3.7? Not sure if that is advised or whether it is best to use the default interpreter?

I have updated the kernel as you suggested and it has worked.

[ccordoba12]

I had spyder 4.x.x, it was working fine. but every launch, i was prompted to upgrade to 5.0.0.

You can select not showing that message again in the dialog that prompts to update. We inform users about new versions because (usually) they fix important problems present in previous ones. But it’s not mandatory to update.

I get the problem below after doing pip install --upgrade spyder

That’s a duplicate of issue #15091 and it’ll be fixed in our next version (5.0.1). You can safely ignore that message for now, it’s a false alarm.