Cannot start kernel

[BastianZim]

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

I cannot start the kernel as I get this error:

/var/folders/j5/ym3yhfx510d4v_cnz9j6rmd80000gn/T/spyder‑bastianzimmermann/mambafghosw4ixz6: line 5: exec: ‑‑: invalid option
exec: usage: exec [‑cl] [‑a name] file [redirection ...]

I installed spyder using micromamba which I installed using brew.

This is a completely fresh installation so the steps are:

1. brew install micromamba
2. Run #{opt_bin}/mamba shell init --shell zsh --root-prefix ~/mamba
3. mamba create -n test_env python spyder
4. spyder
5. Error message from above

I already resetted spyder.

What steps reproduce the problem?

1. Start spyder

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

To connect to kernel

Doesn't connect to kernel

Paste Traceback/Error Below (if applicable)

Traceback (most recent call last):
  File "<console>", line 2, in <module>
NameError: name 'python' is not defined

Versions

• Spyder version: 6.0.2
• Python version: 3.12.8 64-bit
• Qt version: 5.15.8
• PyQt version: 5.15.9
• Operating System name/version: 15.1.1 (arm64)

Dependencies

# Mandatory:
aiohttp >=3.9.3                  :  3.11.10 (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              :  3.1.0 (OK)
cookiecutter >=1.6.0             :  2.6.0 (OK)
diff_match_patch >=20181111      :  20241021 (OK)
github >=2.3.0                   :  2.5.0 (OK)
importlib_metadata >=4.6.0       :  8.5.0 (OK)
intervaltree >=3.0.2             :  3.1.0 (OK)
IPython >=8.13.0,<9.0.0,!=8.17.1 :  8.30.0 (OK)
jedi >=0.17.2,<0.20.0            :  0.19.2 (OK)
jellyfish >=0.7                  :  1.1.2 (OK)
jsonschema >=3.2.0               :  4.23.0 (OK)
keyring >=17.0.0                 :  25.5.0 (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                     :  6.1.0 (OK)
pygments >=2.0                   :  2.18.0 (OK)
pylint >=3.1,<4                  :  3.3.2 (OK)
pylint_venv >=3.0.2              :  3.0.4 (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                :  0.2.4 (OK)
qtawesome >=1.3.1,<1.4.0         :  1.3.1 (OK)
qtconsole >=5.6.1,<5.7.0         :  5.6.1 (OK)
qtpy >=2.4.0                     :  2.4.2 (OK)
rtree >=0.9.7                    :  1.3.0 (OK)
setuptools >=49.6.0              :  75.6.0 (OK)
sphinx >=0.6.6                   :  8.1.3 (OK)
spyder_kernels >=3.0.1,<3.1.0    :  3.0.2 (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                :  6.0.0 (OK)
yarl >=1.9.4                     :  1.18.3 (OK)
zmq >=24.0.0                     :  26.2.0 (OK)

# Optional:
cython >=0.21                    :  None (NOK)
matplotlib >=3.0.0               :  None (NOK)
numpy >=1.7                      :  None (NOK)
pandas >=1.1.1                   :  None (NOK)
scipy >=0.17.0                   :  None (NOK)
sympy >=0.7.3                    :  None (NOK)

[ccordoba12]

Hey @BastianZim, thanks for reporting. A couple of questions:

• What's your micromamba/mamba versions?
• What happens if you uninstall micromamba and only leave mamba?

[BastianZim]

Hi @ccordoba12 Thanks for your response!

I am using only micromamba but think that that might be the reason (See mamba-org/mamba#3687 for more info).

I will first file an issue with homebrew and then come back to this issue.

Thank you!