No way to use kernels from other envs

[Stargrazer82301]

Description of your problem

There doesn't seem to be a way to change the kernel to one in a different virtual env. When going to the "select kernel" interface, it lists other sessions, but those sessions were all started in the preferred kernel, which uses the default env, so selecting a different one of them won't change the env being used.

I'm sure this used to be possible a few versions ago?

What steps will reproduce the problem?

1. Click on "select kernel"

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

Ability to select different env for kernel.

Please provide any additional information below (stack trace, screenshots, a gif, etc)

Versions and main components

• Spyder Version: 3.90
• Python Version: 6.0.1
• Qt Version: qt-main = 5.15.8
• PyQt Version: 2.4.1
• Jupyter Notebook Version: jupyter_core = 5.7.2
• Operating system: MacOS 13 and RHEL 8

Dependencies

Please go to the menu entry Help > Optional Dependencies (or
Help > Dependencies), press the button Copy to clipboard
and paste the contents below:

Mandatory:

aiohttp >=3.9.3 : 3.10.10 (OK)
applaunchservices >=0.3.0 : 0.3.0 (OK)
asyncssh >=2.14.0,<3.0.0 : 2.18.0 (OK)
atomicwrites >=1.2.0 : 1.4.1 (OK)
chardet >=2.0.0 : 5.2.0 (OK)
cloudpickle >=0.5.0 : 3.0.0 (OK)
cookiecutter >=1.6.0 : 2.6.0 (OK)
diff_match_patch >=20181111 : 20230430 (OK)
github >=2.3.0 : 2.4.0 (OK)
importlib_metadata >=4.6.0 : 8.4.0 (OK)
intervaltree >=3.0.2 : 3.1.0 (OK)
IPython >=8.13.0,<9.0.0,!=8.17.1 : 8.27.0 (OK)
jedi >=0.17.2,<0.20.0 : 0.19.1 (OK)
jellyfish >=0.7 : 1.1.0 (OK)
jsonschema >=3.2.0 : 4.23.0 (OK)
keyring >=17.0.0 : 25.3.0 (OK)
nbconvert >=4.0 : 7.16.4 (OK)
numpydoc >=0.6.0 : 1.8.0 (OK)
parso >=0.7.0,<0.9.0 : 0.8.4 (OK)
pexpect >=4.4.0 : 4.9.0 (OK)
pickleshare >=0.4 : 0.7.5 (OK)
psutil >=5.3 : 6.0.0 (OK)
pygments >=2.0 : 2.18.0 (OK)
pylint >=3.1,<4 : 3.3.1 (OK)
pylint_venv >=3.0.2 : 3.0.3 (OK)
pyls_spyder >=0.4.0 : 0.4.0 (OK)
pylsp >=1.12.0,<1.13.0 : 1.12.0 (OK)
pylsp_black >=2.0.0,<3.0.0 : 2.0.0 (OK)
pyuca >=1.2 : 1.2 (OK)
qdarkstyle >=3.2.0,<3.3.0 : 3.2.3 (OK)
qstylizer >=0.2.2 : 0.2.3 (OK)
qtawesome >=1.3.1,<1.4.0 : 1.3.1 (OK)
qtconsole >=5.6.0,<5.7.0 : 5.6.1 (OK)
qtpy >=2.4.0 : 2.4.1 (OK)
rtree >=0.9.7 : 1.3.0 (OK)
setuptools >=49.6.0 : 73.0.1 (OK)
sphinx >=0.6.6 : 8.0.2 (OK)
spyder_kernels >=3.0.0,<3.1.0 : 3.0.1 (OK)
superqt >=0.6.2,<1.0.0 : 0.6.7 (OK)
textdistance >=4.2.0 : 4.6.2 (OK)
three_merge >=0.1.1 : 0.1.1 (OK)
watchdog >=0.10.3 : 5.0.2 (OK)
yarl >=1.9.4 : 1.16.0 (OK)
zmq >=24.0.0 : 26.2.0 (OK)

Optional:

cython >=0.21 : None (NOK)
matplotlib >=3.0.0 : 3.9.2 (OK)
numpy >=1.7 : 2.1.1 (OK)
pandas >=1.1.1 : 2.2.2 (OK)
scipy >=0.17.0 : 1.14.1 (OK)
sympy >=0.7.3 : None (NOK)

Spyder plugins:

spyder_notebook.notebookplugin 0.6.1 : 0.6.1 (OK)