Python cannot import neuron library on Windows install

[pascal]

I'm having trouble installing NEURON 8.2 on Windows 11. I installed NEURON 8.2 using the installer from the website, then installed Anaconda. When I open Python and type from neuron import h, I get this:

Traceback (most recent call last):
File "c:\nrn\lib\python\neuron\__init__.py", line 135, in <module>
from . import hoc
ImportError: cannot import name 'hoc' from partially initialized module 'neuron' (most likely due to a circular import) (c:\nrn\lib\python\neuron\__init__.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "c:\nrn\lib\python\neuron\__init__.py", line 137, in <module>
import neuron.hoc
ModuleNotFoundError: No module named 'neuron.hoc'

[ted]

Uninstall NEURON, then reinstall it.

[pascal]

Uninstalled, reinstalled, restarted...still the exact same error message.

[pascal]

All right, finally got it working. I uninstalled both NEURON and Anaconda. I then re-installed them, but installed Anaconda first, and NEURON second. (Before, the order was reversed.) I'm not sure why, but the order of installation seemed to matter, at least in my case.

[ted]

Thanks for the followup on that. I always adivse users to install Python first, then NEURON. The fact that you had to uninstall both, then install Python, and finally NEURON, doubtless contains a clue . . . if we're smart enough to figure out what it might be.

[patoorio]

Hi,

I am having the same issue with my Python/Windows installation:

Code: Select all

from neuron import h
Traceback (most recent call last):

  File c:\nrn\lib\python\neuron\__init__.py:135
    from . import hoc

ImportError: cannot import name 'hoc' from partially initialized module 'neuron' (most likely due to a circular import) (c:\nrn\lib\python\neuron\__init__.py)


During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  Cell In[1], line 1
    from neuron import h

  File c:\nrn\lib\python\neuron\__init__.py:137
    import neuron.hoc

ModuleNotFoundError: No module named 'neuron.hoc'

I uninstalled everything, then installed Python (miniconda) and finally Neuron. But the error arised again.
Looking at the C:\nrn\lib\python\neuron folder, I noticed the following files:

Code: Select all

hoc.cp37-win_amd64.pyd
hoc.cp38-win_amd64.pyd
hoc.cp39-win_amd64.pyd
hoc.cp310-win_amd64.pyd
hoc.cp311-win_amd64.pyd

But no 'cp312' file. However, I am using Python 3.12. Is it possible that the current version of Neuron is not meant to work with Python 3.12? (although under the Windows Subsystem for Linux it DOES run perfectly with Python 3.12).
What else can be happening? I took care of cleaning as much hidden folders and configuration files as I could before reinstalling everything.