Adding neuron input to EnsembleArray raises error

[pabogdan]

Minimal example:

import nengo
import numpy as np

model = nengo.Network("Broken!")

with model:
    some_input = nengo.Node(np.sin)
    some_inhibition = nengo.Node(np.cos)

    A = nengo.networks.EnsembleArray(n_neurons=100, n_ensembles=1, ens_dimensions=1)
    inhibiting_input = A.add_neuron_input()

    nengo.Connection(some_input, A.input)
    nengo.Connection(some_inhibition, inhibiting_input, transform=[[-2.5]]*100)

This works with nengo, fails with nengo_spinnaker.

Traceback (most recent call last):
  File "/home/bogdanp/nengo_gui/nengo_gui/page.py", line 435, in build
    self.sim = backend.Simulator(self.model)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/simulator.py", line 103, in __init__
    self.model.build(network, **builder_kwargs)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/builder/builder.py", line 204, in build
    self._build_network(network)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/builder/builder.py", line 212, in _build_network
    self._build_network(subnet)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/builder/builder.py", line 224, in _build_network
    self.make_connection(connection)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/builder/builder.py", line 257, in make_connection
    sink = self._sink_getters[post_type](self, conn)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/builder/ensemble.py", line 64, in get_neurons_sink
    elif np.all(connection.transform[1:] == connection.transform[0]):
ValueError: cannot slice a 0-d array

[mundya]

(Just a note, this is kind of an instance of #30)

[mundya]

Fixing this is on the todo list for Spaun, a quick work around whenever you want to do this kind of thing is:

for ens in A.ea_ensembles:
    nengo.Connection(x, ens.neurons, transform=[[-2.5]] * ens.n_neurons)

[pabogdan]

This is the effect of the suggested hack. Should I revert back to multiple Ensembles instead of using EnsembleArrays?

Traceback (most recent call last):
  File "/home/bogdanp/nengo_gui/nengo_gui/page.py", line 464, in runner
    self.sim.run_steps(self.sim.max_steps)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/simulator.py", line 195, in run_steps
    self._run_steps(n_steps)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/simulator.py", line 246, in _run_steps
    self.host_sim.step()
  File "/usr/local/lib/python2.7/dist-packages/nengo-2.1.0_dev-py2.7.egg/nengo/simulator.py", line 181, in step
    step_fn()
  File "/usr/local/lib/python2.7/dist-packages/nengo-2.1.0_dev-py2.7.egg/nengo/builder/operator.py", line 384, in step_simpyfunc
    y = fn(t_sig.item(), *args) if t_in else fn(*args)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/simulator.py", line 305, in func
    return f(t, x)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/builder/node.py", line 380, in output
    self.controller.set_node_output(self.target, value)
  File "/home/bogdanp/nengo_spinnaker/nengo_spinnaker/node_io/ethernet.py", line 128, in set_node_output
    self.out_socket.sendto(packet.bytestring,
  File "/usr/local/lib/python2.7/dist-packages/rig-0.8.0-py2.7.egg/rig/machine_control/packets.py", line 65, in bytestring
    (self.src_port & 0x7) << 5 | (self.src_cpu & 0x1f),
TypeError: unsupported operand type(s) for &: 'NoneType' and 'int'

[mundya]

Sorry, can you update your copy of Rig?

[pabogdan]

I don't know what x is, but I can running the debugger and check. Will also update rig and see how it goes.

Update 1: pip causing issues and trying to install numpy. Will try and install rig manually, from git

[mundya]

(Re x, I meant the object you were connecting to the neurons from [in the example from 3 days ago])

[pabogdan]

Manually installing rig from git seems to work (could you please update the pip packages so that everything works with python setup.py by default?).

I am connecting the output of a Basal Ganglia directly to the neurons, so the transform is [[1]] * n_neurons

@mundya thank you!

[mundya]

could you please update the pip packages so that everything works with python setup.py by default?

As far as I can tell the version of Rig on PIP is correct (0.10.0), did pip install -U rig not work for you?

[mossblaser]

Manually installing rig from git seems to work (could you please update the pip packages so that everything works withpython setup.py by default?).

The offending change is already released, I believe. Try

pip install "rig>=0.10.0"

On 30 November 2015 at 09:56, Petrut Antoniu Bogdan < notifications@github.com> wrote:

Manually installing rig from git seems to work (could you please update the pip packages so that everything works with python setup.py by default?).

I am connecting the output of a Basal Ganglia directly to the neurons, so the transform is [[1]] * n_neurons

— Reply to this email directly or view it on GitHub https://github.com/project-rig/nengo_spinnaker/issues/89#issuecomment-160581057 .

[mundya]

@pabogdan - when you're back from your well-earned break would you mind seeing if this is still a problem for you? Thanks :)

[pabogdan]

@mundya I will definitely :) This will be around the 5th of July.

[mundya]

Thanks, 'fraid I won't be around until 19th.