def Perceptron(input1, input2, output) :
   outputP = input1*weights[0]+input2*weights[1]+bias*weights[2]
   if outputP > 0 : #activation function (here Heaviside)
      outputP = 1
   else :
      outputP = 0
   error = output – outputP
   weights[0] += error * input1 * lr
   weights[1] += error * input2 * lr
   weights[2] += error * bias * lr