def testNumConnectedSynapses(self):
"""
Test that connections are generated on predefined segments.
"""
random = Random(1981)
active_cells = np.array(random.sample(
np.arange(0, NUM_CELLS, 1, dtype="uint32"), 40),
dtype="uint32")
active_cells.sort()
presynaptic_input = list(range(0, 10))
presynaptic_input_set = set(presynaptic_input)
inputSDR = SDR(1024)
inputSDR.sparse = presynaptic_input
connections = Connections(NUM_CELLS, 0.2)
for i in range(NUM_CELLS):
seg = connections.createSegment(i, 1)
for cell in active_cells:
segments = connections.segmentsForCell(cell)
segment = segments[0]
for c in presynaptic_input:
connections.createSynapse(segment, c, 0.1)
connections.adaptSegment(segment, inputSDR, 0.1, 0.0, False)
connected_synapses = connections.numConnectedSynapses(segment)
self.assertEqual(connected_synapses, len(presynaptic_input),
"Missing synapses")
presynaptic_input1 = list(range(0, 5))
presynaptic_input_set1 = set(presynaptic_input1)
inputSDR.sparse = presynaptic_input1
total_connected = 0
for cell in active_cells:
segments = connections.segmentsForCell(cell)
segment = segments[0]
connections.adaptSegment(segment, inputSDR, 0.0, 0.1, False)
connected_synapses = connections.numConnectedSynapses(segment)
self.assertEqual(connected_synapses, len(presynaptic_input1),
"Missing synapses")
total_connected += connected_synapses
connected_synapses = connections.numSynapses(segment)
self.assertEqual(connected_synapses, len(presynaptic_input),
"Missing synapses")
self.assertEqual(total_connected,
len(presynaptic_input1) * 40, "Missing synapses")
def testDestroySegment(self):
co = Connections(NUM_CELLS, 0.51)
self.assertEqual(co.numSegments(), 0, "there are zero segments yet")
# removing while no segments exist
co.destroySegment(1)
# successfully remove
seg = co.createSegment(1, 20)
self.assertEqual(co.numSegments(), 1)
n = co.numConnectedSynapses(seg) #uses dataForSegment()
co.destroySegment(seg)
self.assertEqual(co.numSegments(), 0,
"segment should have been removed")
with pytest.raises(RuntimeError):
n2 = co.numConnectedSynapses(seg)
def testDestroySegment(self):
co = Connections(NUM_CELLS, 0.51)
self.assertEqual(co.numSegments(), 0, "there are zero segments yet")
# successfully remove
seg = co.createSegment(1, 20)
self.assertEqual(co.numSegments(), 1)
n = co.numConnectedSynapses(seg) #uses dataForSegment()
co.destroySegment(seg)
self.assertEqual(co.numSegments(), 0, "segment should have been removed")