def testDestroySegment(self):
""" Creates a segment, destroys it, and makes sure it got destroyed along
with all of its synapses.
"""
connections = Connections(1024)
connections.createSegment(10)
segment2 = connections.createSegment(20)
connections.createSegment(30)
connections.createSegment(40)
connections.createSynapse(segment2, 80, 0.85)
connections.createSynapse(segment2, 81, 0.85)
connections.createSynapse(segment2, 82, 0.15)
self.assertEqual(4, connections.numSegments())
self.assertEqual(3, connections.numSynapses())
connections.destroySegment(segment2)
self.assertEqual(3, connections.numSegments())
self.assertEqual(0, connections.numSynapses())
(numActiveConnected,
numActivePotential) = connections.computeActivity([80, 81, 82], 0.5)
self.assertEqual(0, numActiveConnected[segment2.flatIdx])
self.assertEqual(0, numActivePotential[segment2.flatIdx])
def testComputeActivity(self):
""" Creates a sample set of connections, and makes sure that computing the
activity for a collection of cells with no activity returns the right
activity data.
"""
connections = Connections(1024)
# Cell with 1 segment.
# Segment with:
# - 1 connected synapse: active
# - 2 matching synapses
segment1a = connections.createSegment(10)
connections.createSynapse(segment1a, 150, .85)
connections.createSynapse(segment1a, 151, .15)
# Cell with 1 segment.
# Segment with:
# - 2 connected synapse: 2 active
# - 3 matching synapses: 3 active
segment2a = connections.createSegment(20)
connections.createSynapse(segment2a, 80, .85)
connections.createSynapse(segment2a, 81, .85)
synapse = connections.createSynapse(segment2a, 82, .85)
connections.updateSynapsePermanence(synapse, .15)
inputVec = [50, 52, 53, 80, 81, 82, 150, 151]
(numActiveConnected,
numActivePotential) = connections.computeActivity(inputVec, .5)
self.assertEqual(1, numActiveConnected[segment1a.flatIdx])
self.assertEqual(2, numActivePotential[segment1a.flatIdx])
self.assertEqual(2, numActiveConnected[segment2a.flatIdx])
self.assertEqual(3, numActivePotential[segment2a.flatIdx])
def testWriteRead(self):
c1 = Connections(1024)
# Add data before serializing
s1 = c1.createSegment(0)
c1.createSynapse(s1, 254, 0.1173)
s2 = c1.createSegment(100)
c1.createSynapse(s2, 20, 0.3)
c1.createSynapse(s1, 40, 0.3)
s3 = c1.createSegment(0)
c1.createSynapse(s3, 0, 0.5)
c1.createSynapse(s3, 1, 0.5)
s4 = c1.createSegment(10)
c1.createSynapse(s4, 0, 0.5)
c1.createSynapse(s4, 1, 0.5)
c1.destroySegment(s4)
proto1 = ConnectionsProto_capnp.ConnectionsProto.new_message()
c1.write(proto1)
# Write the proto to a temp file and read it back into a new proto
with tempfile.TemporaryFile() as f:
proto1.write(f)
f.seek(0)
proto2 = ConnectionsProto_capnp.ConnectionsProto.read(f)
# Load the deserialized proto
c2 = Connections.read(proto2)
# Check that the two connections objects are functionally equal
self.assertEqual(c1, c2)
def testCreateSegment(self):
connections = Connections(1024)
segment1 = connections.createSegment(10)
self.assertEqual(segment1.cell, 10)
segment2 = connections.createSegment(10)
self.assertEqual(segment2.cell, 10)
self.assertEqual([segment1, segment2],
list(connections.segmentsForCell(10)))
def testPathsNotInvalidatedByOtherDestroys(self):
""" Creates segments and synapses, then destroys segments and synapses on
either side of them and verifies that existing Segment and Synapse
instances still point to the same segment / synapse as before.
"""
connections = Connections(1024)
segment1 = connections.createSegment(11)
connections.createSegment(12)
segment3 = connections.createSegment(13)
connections.createSegment(14)
segment5 = connections.createSegment(15)
synapse1 = connections.createSynapse(segment3, 201, .85)
synapse2 = connections.createSynapse(segment3, 202, .85)
synapse3 = connections.createSynapse(segment3, 203, .85)
synapse4 = connections.createSynapse(segment3, 204, .85)
synapse5 = connections.createSynapse(segment3, 205, .85)
self.assertEqual(203, synapse3.presynapticCell)
connections.destroySynapse(synapse1)
self.assertEqual(203, synapse3.presynapticCell)
connections.destroySynapse(synapse5)
self.assertEqual(203, synapse3.presynapticCell)
connections.destroySegment(segment1)
self.assertEqual(set([synapse2, synapse3, synapse4]),
connections.synapsesForSegment(segment3))
connections.destroySegment(segment5)
self.assertEqual(set([synapse2, synapse3, synapse4]),
connections.synapsesForSegment(segment3))
self.assertEqual(203, synapse3.presynapticCell)
def testCreateSegmentReuse(self):
connections = Connections(1024, 2)
segment1 = connections.createSegment(42)
connections.createSynapse(segment1, 1, .5)
connections.createSynapse(segment1, 2, .5)
# Let some time pass.
connections.startNewIteration()
connections.startNewIteration()
connections.startNewIteration()
# Create a segment with 3 synapse.
segment2 = connections.createSegment(42)
connections.createSynapse(segment2, 1, .5)
connections.createSynapse(segment2, 2, .5)
connections.createSynapse(segment2, 3, .5)
connections.startNewIteration()
# Give the first segment some activity.
connections.recordSegmentActivity(segment1)
# Create a new segment with 1 synapse.
segment3 = connections.createSegment(42)
connections.createSynapse(segment3, 1, .5)
segments = connections.segmentsForCell(42)
self.assertEqual(2, len(segments))
# Verify first segment is still there with the same synapses.
self.assertEqual(set([1, 2]),
set(synapse.presynapticCell for synapse in
connections.synapsesForSegment(segments[0])))
# Verify second segment has been replaced.
self.assertEqual(set([1]),
set(synapse.presynapticCell for synapse in
connections.synapsesForSegment(segments[1])))
# Verify the flatIdxs were properly reused.
self.assertLess(segment1.flatIdx, 2)
self.assertLess(segment3.flatIdx, 2)
self.assertTrue(segment1 is connections.segmentForFlatIdx(segment1.flatIdx))
self.assertTrue(segment3 is connections.segmentForFlatIdx(segment3.flatIdx))
def testUpdateSynapsePermanence(self):
""" Creates a synapse and updates its permanence, and makes sure that its
data was correctly updated.
"""
connections = Connections(1024)
segment = connections.createSegment(10)
synapse = connections.createSynapse(segment, 50, .34)
connections.updateSynapsePermanence(synapse, .21)
synapseData = connections.dataForSynapse(synapse)
self.assertAlmostEqual(synapseData.permanence, .21)
def testUpdateSynapsePermanence(self):
""" Creates a synapse and updates its permanence, and makes sure that its
data was correctly updated.
"""
connections = Connections(1024)
segment = connections.createSegment(10)
synapse = connections.createSynapse(segment, 50, .34)
connections.updateSynapsePermanence(synapse, .21)
synapseData = connections.dataForSynapse(synapse)
self.assertAlmostEqual(synapseData.permanence, .21)
def testReuseSegmentWithDestroyedSynapses(self):
""" Destroy a segment that has a destroyed synapse and a non-destroyed
synapse. Create a new segment in the same place. Make sure its synapse
count is correct.
"""
connections = Connections(1024)
segment = connections.createSegment(11)
synapse1 = connections.createSynapse(segment, 201, .85)
connections.createSynapse(segment, 202, .85)
connections.destroySynapse(synapse1)
self.assertEqual(1, connections.numSynapses(segment))
connections.destroySegment(segment)
reincarnated = connections.createSegment(11)
self.assertEqual(0, connections.numSynapses(reincarnated))
self.assertEqual(0, len(connections.synapsesForSegment(reincarnated)))
def testReuseSegmentWithDestroyedSynapses(self):
""" Destroy a segment that has a destroyed synapse and a non-destroyed
synapse. Create a new segment in the same place. Make sure its synapse
count is correct.
"""
connections = Connections(1024)
segment = connections.createSegment(11)
synapse1 = connections.createSynapse(segment, 201, .85)
connections.createSynapse(segment, 202, .85)
connections.destroySynapse(synapse1)
self.assertEqual(1, connections.numSynapses(segment))
connections.destroySegment(segment)
reincarnated = connections.createSegment(11)
self.assertEqual(0, connections.numSynapses(reincarnated))
self.assertEqual(0, len(connections.synapsesForSegment(reincarnated)))
def testReachSegmentLimitMultipleTimes(self):
""" Hit the maxSynapsesPerSegment threshold multiple times. Make sure it
works more than once.
"""
connections = Connections(1024, 2, 2)
segment = connections.createSegment(10)
connections.createSynapse(segment, 201, .85)
self.assertEqual(1, connections.numSynapses())
connections.createSynapse(segment, 202, .9)
self.assertEqual(2, connections.numSynapses())
connections.createSynapse(segment, 203, .8)
self.assertEqual(2, connections.numSynapses())
synapse = connections.createSynapse(segment, 204, .8)
self.assertEqual(2, connections.numSynapses())
def testReachSegmentLimitMultipleTimes(self):
""" Hit the maxSynapsesPerSegment threshold multiple times. Make sure it
works more than once.
"""
connections = Connections(1024, 2, 2)
segment = connections.createSegment(10)
connections.createSynapse(segment, 201, .85)
self.assertEqual(1, connections.numSynapses())
connections.createSynapse(segment, 202, .9)
self.assertEqual(2, connections.numSynapses())
connections.createSynapse(segment, 203, .8)
self.assertEqual(2, connections.numSynapses())
synapse = connections.createSynapse(segment, 204, .8)
self.assertEqual(2, connections.numSynapses())
def testDestroySynapsesThenReachLimit(self):
""" Destroy some synapses then verify that the maxSynapsesPerSegment is
still correctly applied.
"""
connections = Connections(1024, 2, 2)
segment = connections.createSegment(10)
synapse1 = connections.createSynapse(segment, 201, .85)
synapse2 = connections.createSynapse(segment, 202, .85)
self.assertEqual(2, connections.numSynapses())
connections.destroySynapse(synapse1)
connections.destroySynapse(synapse2)
self.assertEqual(0, connections.numSynapses())
connections.createSynapse(segment, 201, .85)
self.assertEqual(1, connections.numSynapses())
connections.createSynapse(segment, 202, .90)
self.assertEqual(2, connections.numSynapses())
synapse3 = connections.createSynapse(segment, 203, .8)
self.assertEqual(2, connections.numSynapses())
def testDestroySynapsesThenReachLimit(self):
""" Destroy some synapses then verify that the maxSynapsesPerSegment is
still correctly applied.
"""
connections = Connections(1024, 2, 2)
segment = connections.createSegment(10)
synapse1 = connections.createSynapse(segment, 201, .85)
synapse2 = connections.createSynapse(segment, 202, .85)
self.assertEqual(2, connections.numSynapses())
connections.destroySynapse(synapse1)
connections.destroySynapse(synapse2)
self.assertEqual(0, connections.numSynapses())
connections.createSynapse(segment, 201, .85)
self.assertEqual(1, connections.numSynapses())
connections.createSynapse(segment, 202, .90)
self.assertEqual(2, connections.numSynapses())
synapse3 = connections.createSynapse(segment, 203, .8)
self.assertEqual(2, connections.numSynapses())
def testSynapseReuse(self):
""" Creates a synapse over the synapses per segment limit, and verifies
that the lowest permanence synapse is removed to make room for the new
synapse.
"""
connections = Connections(1024, 1024, 2)
segment = connections.createSegment(10)
synapse1 = connections.createSynapse(segment, 50, .34)
synapse2 = connections.createSynapse(segment, 51, .48)
synapses = connections.synapsesForSegment(segment)
self.assertEqual(set([synapse1, synapse2]), synapses)
# Add an additional synapse to force it over the limit of num synapses
# per segment.
connections.createSynapse(segment, 52, .52)
# Ensure lower permanence synapse was removed.
self.assertEqual(set([51, 52]),
set(synapse.presynapticCell
for synapse in
connections.synapsesForSegment(segment)))
def testSynapseReuse(self):
""" Creates a synapse over the synapses per segment limit, and verifies
that the lowest permanence synapse is removed to make room for the new
synapse.
"""
connections = Connections(1024, 1024, 2)
segment = connections.createSegment(10)
synapse1 = connections.createSynapse(segment, 50, .34)
synapse2 = connections.createSynapse(segment, 51, .48)
synapses = connections.synapsesForSegment(segment)
self.assertEqual(set([synapse1, synapse2]), synapses)
# Add an additional synapse to force it over the limit of num synapses
# per segment.
connections.createSynapse(segment, 52, .52)
# Ensure lower permanence synapse was removed.
self.assertEqual(
set([51, 52]),
set(synapse.presynapticCell
for synapse in connections.synapsesForSegment(segment)))
def testDestroySynapse(self):
""" Creates a segment, creates a number of synapses on it, destroys a
synapse, and makes sure it got destroyed.
"""
connections = Connections(1024)
segment = connections.createSegment(20)
synapse1 = connections.createSynapse(segment, 80, .85)
synapse2 = connections.createSynapse(segment, 81, .85)
synapse3 = connections.createSynapse(segment, 82, .15)
self.assertEqual(3, connections.numSynapses())
connections.destroySynapse(synapse2)
self.assertEqual(2, connections.numSynapses())
self.assertEqual(set([synapse1, synapse3]),
connections.synapsesForSegment(segment))
(numActiveConnected,
numActivePotential) = connections.computeActivity([80, 81, 82], .5)
self.assertEqual(1, numActiveConnected[segment.flatIdx])
self.assertEqual(2, numActivePotential[segment.flatIdx])
def testDestroySynapse(self):
""" Creates a segment, creates a number of synapses on it, destroys a
synapse, and makes sure it got destroyed.
"""
connections = Connections(1024)
segment = connections.createSegment(20)
synapse1 = connections.createSynapse(segment, 80, .85)
synapse2 = connections.createSynapse(segment, 81, .85)
synapse3 = connections.createSynapse(segment, 82, .15)
self.assertEqual(3, connections.numSynapses())
connections.destroySynapse(synapse2)
self.assertEqual(2, connections.numSynapses())
self.assertEqual(set([synapse1, synapse3]),
connections.synapsesForSegment(segment))
(numActiveConnected,
numActivePotential) = connections.computeActivity([80, 81, 82], .5)
self.assertEqual(1, numActiveConnected[segment.flatIdx])
self.assertEqual(2, numActivePotential[segment.flatIdx])
def testDestroySegmentWithDestroyedSynapses(self):
""" Destroy a segment that has a destroyed synapse and a non-destroyed
synapse. Make sure nothing gets double-destroyed.
"""
connections = Connections(1024)
segment1 = connections.createSegment(11)
segment2 = connections.createSegment(12)
connections.createSynapse(segment1, 101, .85)
synapse2a = connections.createSynapse(segment2, 201, .85)
connections.createSynapse(segment2, 202, .85)
self.assertEqual(3, connections.numSynapses())
connections.destroySynapse(synapse2a)
self.assertEqual(2, connections.numSegments())
self.assertEqual(2, connections.numSynapses())
connections.destroySegment(segment2)
self.assertEqual(1, connections.numSegments())
self.assertEqual(1, connections.numSynapses())
def testDestroySegmentWithDestroyedSynapses(self):
""" Destroy a segment that has a destroyed synapse and a non-destroyed
synapse. Make sure nothing gets double-destroyed.
"""
connections = Connections(1024)
segment1 = connections.createSegment(11)
segment2 = connections.createSegment(12)
connections.createSynapse(segment1, 101, .85)
synapse2a = connections.createSynapse(segment2, 201, .85)
connections.createSynapse(segment2, 202, .85)
self.assertEqual(3, connections.numSynapses())
connections.destroySynapse(synapse2a)
self.assertEqual(2, connections.numSegments())
self.assertEqual(2, connections.numSynapses())
connections.destroySegment(segment2)
self.assertEqual(1, connections.numSegments())
self.assertEqual(1, connections.numSynapses())
def testDestroySegmentsThenReachLimit(self):
""" Destroy some segments then verify that the maxSegmentsPerCell is still
correctly applied.
"""
connections = Connections(1024, 2, 2)
segment1 = connections.createSegment(11)
segment2 = connections.createSegment(11)
self.assertEqual(2, connections.numSegments())
connections.destroySegment(segment1)
connections.destroySegment(segment2)
self.assertEqual(0, connections.numSegments())
connections.createSegment(11)
self.assertEqual(1, connections.numSegments())
connections.createSegment(11)
self.assertEqual(2, connections.numSegments())
segment3 = connections.createSegment(11)
self.assertEqual(2, connections.numSegments(11))
self.assertEqual(2, connections.numSegments())
def testDestroySegmentsThenReachLimit(self):
""" Destroy some segments then verify that the maxSegmentsPerCell is still
correctly applied.
"""
connections = Connections(1024, 2, 2)
segment1 = connections.createSegment(11)
segment2 = connections.createSegment(11)
self.assertEqual(2, connections.numSegments())
connections.destroySegment(segment1)
connections.destroySegment(segment2)
self.assertEqual(0, connections.numSegments())
connections.createSegment(11)
self.assertEqual(1, connections.numSegments())
connections.createSegment(11)
self.assertEqual(2, connections.numSegments())
segment3 = connections.createSegment(11)
self.assertEqual(2, connections.numSegments(11))
self.assertEqual(2, connections.numSegments())