Cassidoo 2019-11-11 challenge

cassidoo-1111.py

# Write a program that implements logic gs AND, OR, NOT, NAND, NOR, XOR, and XNOR.
# thanks to Ryan North ( https://www.howtoinventeverything.com/, Chapter 17 )

def lG(g, *a):
    v = (0, 1)
    for i in a:
        if i not in v:
            return -1
    if g == 'NOT':
        return (1 - a[0])
    if g == 'OR':
        if a[0]:
            return(a[0])
        else:
            return(a[1])
    if g == 'AND':
        if lG('NOT', a[0]):
            return 0
        else:
            if lG('NOT', a[1]):
                return 0
            else:
                return 1
    if g == "NAND":
        return lG('NOT', lG('AND', a[0], a[1]))
    if g == "NOR":
        return lG('NOT', lG('OR', a[0], a[1]))
    if g == "XOR":
        return logicGate('AND', logicGate('NAND', a[0], a[1]), logicGate('OR', a[0], a[1]))
    if g == "XNOR":
        return logicGate('NOT', logicGate('AND', logicGate('NAND', a[0], a[1]), logicGate('OR', a[0], a[1])))
    
print('ERROR TESTING')
print('should be -1', logicGate('NOT', 2))
print('NOT')
print('should be 0', lG('NOT', 1))
print('should be 1', lG('NOT', 0))
print('OR')
print('should be 0', lG('OR', 0, 0))
print('should be 1', lG('OR', 1, 0))
print('should be 1', lG('OR', 0, 1))
print('should be 1', lG('OR', 1, 1))
print('AND')
print('should be 0', lG('AND', 0, 0))
print('should be 0', lG('AND', 1, 0))
print('should be 0', lG('AND', 0, 1))
print('should be 1', lG('AND', 1, 1))
print('NAND')
print('should be 1', lG('NAND', 0, 0))
print('should be 1', lG('NAND', 1, 0))
print('should be 1', lG('NAND', 0, 1))
print('should be 0', lG('NAND', 1, 1))
print('NOR')
print('should be 1', lG('NOR', 0, 0))
print('should be 0', lG('NOR', 1, 0))
print('should be 0', lG('NOR', 0, 1))
print('should be 0', lG('NOR', 1, 1))
print('XOR')
print('should be 0', logicGate('XOR', 0, 0))
print('should be 1', logicGate('XOR', 1, 0))
print('should be 1', logicGate('XOR', 0, 1))
print('should be 0', logicGate('XOR', 1, 1))
print('XNOR')
print('should be 1', logicGate('XNOR', 0, 0))
print('should be 0', logicGate('XNOR', 1, 0))
print('should be 0', logicGate('XNOR', 0, 1))
print('should be 1', logicGate('XNOR', 1, 1))