Dear Andrew,

I have installed PyNN==0.10.0.dev, but actually I am receiving the same error with nest3

IN the bottom the errors. There two related to nest3, one about the 'install' module and the other about the attribute 'kernel'

Thanks for the hints.

Alberto

In [1]: import pyNN as p

In [2]: p.__version__
Out[2]: '0.10.0.dev'

In [3]: import pyNN.nest as sim
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
~/PyNN/pyNN/nest/simulator.py in __init__(self)
56 try:
---> 57 nest.Install('pynn_extensions')
58 self.extensions_loaded = True

AttributeError: module 'nest' has no attribute 'Install'

During handling of the above exception, another exception occurred:

AttributeError Traceback (most recent call last)
<ipython-input-3-3a2fb0d916c8> in <module>
----> 1 import pyNN.nest as sim

~/PyNN/pyNN/nest/__init__.py in <module>
16 import nest
17
---> 18 from . import simulator
19 from pyNN import common, recording, errors, space, __doc__
20 from pyNN.common.control import DEFAULT_MAX_DELAY, DEFAULT_TIMESTEP, DEFAULT_MIN_DELAY

~/PyNN/pyNN/nest/simulator.py in <module>
267 # --- Initialization, and module attributes ------------------------------------
268
--> 269 state = _State() # a Singleton, so only a single instance ever exists
270 del _State

~/PyNN/pyNN/nest/simulator.py in __init__(self)
57 nest.Install('pynn_extensions')
58 self.extensions_loaded = True
---> 59 except nest.kernel.NESTError as err:
60 self.extensions_loaded = False
61 self.initialized = False

AttributeError: module 'nest' has no attribute 'kernel'

Il giorno ven 27 ago 2021 alle ore 11:35 Alberto <vergani.aa@gmail.com> ha scritto:

Hi Andrew,

yes, I have PyNN == 0.9.6, so I will try to downgrade to see if that's the issue.

In the other case, I can install the development version of PyNN

Thanks for the information,
Alberto

Il giorno ven 27 ago 2021 alle ore 11:21 Andrew Davison <andrew.davison@unic.cnrs-gif.fr> ha scritto:
Hi Alberto,

Which versions of PyNN and of NEST are you using?

The current version of PyNN (0.9.6) does not work with NEST 3.0. PyNN 0.10.0 will be released soon (in September), and that will support NEST 3.
If you’re happy to install a development version of PyNN from Github, you can use this branch: https://github.com/apdavison/PyNN/tree/nest-3

Andrew

> On 27 Aug 2021, at 10:49, Alberto <vergani.aa@gmail.com> wrote:
>
> Hi,
>
> suddenly, I am starting having this error.
>
> I have both PyNN and Nest installed.
>
> If it's more related to the PyNN community, I will forward this message to them, but at this moment I don't know if it's more related to Nest or PyNN side.
>
> Maybe some of you have met a similar issue.
>
> >>> import pyNN.nest as sim
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "/home/alberto/.local/lib/python3.8/site-packages/pyNN/nest/__init__.py", line 18, in <module>
> from . import simulator
> File "/home/alberto/.local/lib/python3.8/site-packages/pyNN/nest/simulator.py", line 261, in <module>
> state = _State() # a Singleton, so only a single instance ever exists
> File "/home/alberto/.local/lib/python3.8/site-packages/pyNN/nest/simulator.py", line 58, in __init__
> self.spike_precision = "off_grid"
> File "/home/alberto/.local/lib/python3.8/site-packages/pyNN/nest/simulator.py", line 114, in _set_spike_precision
> nest.SetKernelStatus({'off_grid_spiking': True})
> AttributeError: module 'nest' has no attribute 'SetKernelStatus'
>
> Thanks,
> Alberto
>
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--
Vergani, AA