Python, pasted on Feb 6:
 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 ``` ```# Learning rate: Lower = slower, Higher = less precise rate = 0.1 # Weights inWeight = [0.1,0.1] # Start neuron with no stimuli inNeuron = [0.0, 0.0] # Learning table (AND gate) [inpu1, input2, output] test = [[0.0, 0.0, 0.0], [0.0, 1.0, 0.0], [1.0, 0.0, 0.0], [1.0, 1.0, 1.0]] # Calculate response from neural input def outNeuron(midThresh): global inNeuron, inWeight s = inNeuron[0]*inWeight[0] + inNeuron[1]*inWeight[1] if s > midThresh: return 1 else: return 0 # Display results of test def display(out, real): if out == real: print "Result is " + str(out) + ". It's right." else: print str(out) + " should be " + str(real) counter = 0 while counter < 45: # Loop through each lesson in the learning table for i in range(len(test)): # Stimulate neurons with test input inNeuron[0] = test[i][0] inNeuron[1] = test[i][1] # Adjust weight of neuron #1 # based on feedback, then display out = outNeuron(2) inWeight[0] += rate*(test[i][2]-out) print inWeight[0] display(out, test[i][2]) # Adjust weight of neuron #2 # based on feedback, then display out = outNeuron(2) inWeight[1] += rate*(test[i][2]-out) print inWeight[1] display(out, test[i][2]) # Delay counter += 1 ```

Output:
 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 ``` ```0.1 Result is 0. It's right. 0.1 Result is 0. It's right. 0.1 Result is 0. It's right. 0.1 Result is 0. It's right. 0.1 Result is 0. It's right. 0.1 Result is 0. It's right. 0.2 0 should be 1.0 0.2 0 should be 1.0 0.2 Result is 0. It's right. 0.2 Result is 0. It's right. 0.2 Result is 0. It's right. 0.2 Result is 0. It's right. 0.2 Result is 0. It's right. 0.2 Result is 0. It's right. 0.3 0 should be 1.0 0.3 0 should be 1.0 0.3 Result is 0. It's right. 0.3 Result is 0. It's right. 0.3 Result is 0. It's right. 0.3 Result is 0. It's right. 0.3 Result is 0. It's right. 0.3 Result is 0. It's right. 0.4 0 should be 1.0 0.4 0 should be 1.0 0.4 Result is 0. It's right. 0.4 Result is 0. It's right. 0.4 Result is 0. It's right. 0.4 Result is 0. It's right. 0.4 Result is 0. It's right. 0.4 Result is 0. It's right. 0.5 0 should be 1.0 0.5 0 should be 1.0 0.5 Result is 0. It's right. 0.5 Result is 0. It's right. 0.5 Result is 0. It's right. 0.5 Result is 0. It's right. 0.5 Result is 0. It's right. 0.5 Result is 0. It's right. 0.6 0 should be 1.0 0.6 0 should be 1.0 0.6 Result is 0. It's right. 0.6 Result is 0. It's right. 0.6 Result is 0. It's right. 0.6 Result is 0. It's right. 0.6 Result is 0. It's right. 0.6 Result is 0. It's right. 0.7 0 should be 1.0 0.7 0 should be 1.0 0.7 Result is 0. It's right. 0.7 Result is 0. It's right. 0.7 Result is 0. It's right. 0.7 Result is 0. It's right. 0.7 Result is 0. It's right. 0.7 Result is 0. It's right. 0.8 0 should be 1.0 0.8 0 should be 1.0 0.8 Result is 0. It's right. 0.8 Result is 0. It's right. 0.8 Result is 0. It's right. 0.8 Result is 0. It's right. 0.8 Result is 0. It's right. 0.8 Result is 0. It's right. 0.9 0 should be 1.0 0.9 0 should be 1.0 0.9 Result is 0. It's right. 0.9 Result is 0. It's right. 0.9 Result is 0. It's right. 0.9 Result is 0. It's right. 0.9 Result is 0. It's right. 0.9 Result is 0. It's right. 1.0 0 should be 1.0 1.0 0 should be 1.0 1.0 Result is 0. It's right. 1.0 Result is 0. It's right. 1.0 Result is 0. It's right. 1.0 Result is 0. It's right. 1.0 Result is 0. It's right. 1.0 Result is 0. It's right. 1.1 0 should be 1.0 1.0 Result is 1. It's right. 1.1 Result is 0. It's right. 1.0 Result is 0. It's right. 1.1 Result is 0. It's right. 1.0 Result is 0. It's right. 1.1 Result is 0. It's right. 1.0 Result is 0. It's right. 1.1 Result is 1. It's right. 1.0 Result is 1. It's right. 1.1 Result is 0. It's right. 1.0 Result is 0. It's right. 1.1 Result is 0. It's right. 1.0 Result is 0. It's right. 1.1 Result is 0. It's right. 1.0 Result is 0. It's right. 1.1 Result is 1. It's right. 1.0 Result is 1. It's right. ```