code: def initialize(self):
          
          self.randomize()
          self.dweight = Numeric.zeros(self.size, 'f')
          self.delta = Numeric.zeros(self.size, 'f')
          self.wed = Numeric.zeros(self.size, 'f')
          self.wedLast = Numeric.zeros(self.size, 'f')
          self.target = Numeric.zeros(self.size, 'f')
          self.error = Numeric.zeros(self.size, 'f')
          self.activation = Numeric.zeros(self.size, 'f')
          self.netinput = Numeric.zeros(self.size, 'f')
          self.targetSet = 0
          self.activationSet = 0
          self.verify = 1
          # layer report of stats:
          self.pcorrect = 0
          self.ptotal = 0
          self.correct = 0
          # misc:
          self.minTarget = 0.0
          self.maxTarget = 1.0
          self.minActivation = 0.0
          self.maxActivation = 1.0
docs: Initializes important node values to zero for each node in the
          layer (target, error, activation, dbias, delta, netinput, bed).