AttributeError: 'int' object has no attribute 'output'

Question

I am trying to write a simulator in python for spiking neural networks. Network has been planned to be built from neurons and connections, as below:

Connection class:

class Connection(object):

connectionType = 0   
weight = [[0 for x in range(1)] for x in range(9)]

def __init__():
   self.threshold = 0
   self.connectionType = 0

And Neuron class:

import Connection

class Neuron(object):

ID = 1
OveralPotential = 0

def __init__(self):
    global ID
    self.input = [[0 for x in range(1)] for x in range(9)]
    self.output = [[0 for x in range(1)] for x in range(9)]
    self.id = Neuron.ID
    Neuron.ID += 1

def connect(srcNeuron, dstNeuron, connectionType):
    srcNeuron.output[dstNeuron.id] = 1
    dstNeuron.input[srcNeuron.id] = 1
    Connection.Connection.connectionType = connectionType

if __name__ == "__main__":

n1 = Neuron()
n2 = Neuron()
n3 = Neuron()
print("ID of the 3rd neuron is {0}".format(n3.id))
n4 = Neuron()
n5 = Neuron()

Neuron.connect(1,3,1)
Neuron.connect(1,4,1)
Neuron.connect(1,5,1)
Neuron.connect(2,3,1)
Neuron.connect(2,4,1)
Neuron.connect(2,5,1)

But here is the stacktrace:

ID of the 3rd neuron is 3
Traceback (most recent call last):
File "C:\Program Files\Microsoft Visual Studio      12.0\Common7\IDE\Extensions\Mic
rosoft\Python Tools for Visual Studio\2.1\visualstudio_py_util.py", line   106, in
exec_file
exec_code(code, file, global_variables)
File "C:\Program Files\Microsoft Visual Studio   12.0\Common7\IDE\Extensions\Mic
rosoft\Python Tools for Visual Studio\2.1\visualstudio_py_util.py", line 82,  in
exec_code
exec(code_obj, global_variables)
File "C:\Users\Matinking\Documents\Visual Studio  2013\Projects\NeuroSimulation
\NeuroSimulation\Neuron.py", line 31, in <module>
Neuron.connect(1,3,1)
File "C:\Users\Matinking\Documents\Visual Studio  2013\Projects\NeuroSimulation
\NeuroSimulation\Neuron.py", line 16, in connect
srcNeuron.output[dstNeuron.id] = 1
AttributeError: 'int' object has no attribute 'output'

I checked the possible duplicates in this case, like:

AttributeError: 'int' object has no attribute 'split'

and

AttributeError: 'int' object has no attribute 'write'

But none of them gave me enough insight to handle above stuff. How should I resolve it?!

Thanks in advance

Answer 1

The connect function expects two objects of type Neuron , not a neuron id. You are passing an id, that is an int and python tries to access the output field.

Answer 2

You are passing integer values to the method

def connect(srcNeuron, dstNeuron, connectionType):
    srcNeuron.output[dstNeuron.id] = 1
    dstNeuron.input[srcNeuron.id] = 1
    Connection.Connection.connectionType = connectionType

when you are invoking it

Neuron.connect(1,3,1)
Neuron.connect(1,4,1)
Neuron.connect(1,5,1)
Neuron.connect(2,3,1)
Neuron.connect(2,4,1)
Neuron.connect(2,5,1)

I think you actually meant to specify the neurons instead of integers

Neuron.connect(n1,n3,n1)
Neuron.connect(n1,n4,n1)
Neuron.connect(n1,n5,n1)
Neuron.connect(n2,n3,n1)
Neuron.connect(n2,n4,n1)
Neuron.connect(n2,n5,n1)