Implementing Perceptrons

Easy Implementation

Let's implement the preceding logic circuits with Python. Here, we will define the AND function, which takes x1 and x2 as arguments:

def AND(x1, x2):
    w1, w2, theta = 0.5, 0.5, 0.7
    tmp = x1*w1 + x2*w2
    if tmp <= theta:
        return 0
    elif tmp > theta:
        return 1

The w1, w2, and theta parameters are initialized within the function. When the sum of the weighted inputs exceeds the threshold, it returns 1; otherwise, it returns 0. Let's check that the outputs are the same as the ones shown in Figure 2.2:

AND(0, 0) # 0 (output)
AND(1, 0) # 0 (output)
AND(0, 1) # 0 (output)
AND(1, 1) # 1 (output)

The outputs are as we expected. With that, you have built an AND gate. Although you can use a similar procedure to build a NAND or OR gate,...