dendrite | Dendrite is a second-generation Matrix homeserver

I am trying to create a Neural Network class made up of Neuron objects wired together.

My Neuron class has

1. Dendrites
   The number of dendrites is specified in the parameters when the class is initialised. The Dendrites are stored in a list whose index stores the voltages of each Dendrite. eg: neuron1.dendrites[2]=0.12 volts.
2. Activation (Threshold) Potential The sum of all the dendrite potentials provides the neuron potential. If this potential exceeds the Threshold Potential, my Neuron will fire. There are other neurons connected to the axon of my neuron. The Axon of my Neuron connects to the Dendrites of other Neuron objects. Several Dendrites from other Neurons may connect to the Axon of my Neuron. They will all receive a fixed voltage (outputVoltage) when my Neuron fires. It fires in an All-or-Nothing manner.
3. Firing state
   When the the Activation Potential is reached, the firing state = on (True)
4. My Neuron class also has a setConnections() method. This method receives a python list of Dendrites. In this method, I wish to iterate through my internal list of external Dendrites and reset their voltage values. This is not working. I cannot figure out why and so seek assistance here.

I provide a stripped down version of my code below: