pydigi.py

class Node(object):
    AND = '&'
    NAND = '!&'
    OR = '|'
    NOR = '!OR'
    XOR = '^'
    XNOR = '!^'
    NOT = '!'
    value = False
    def  __init__(self,op):
        self.op = op
        self.connections = set()
    def __call__(self):
        vals = list(map((lambda x:x.value),self.connections))
        op = self.op[:]
        if len(op) < 1: return
        invert = op[0]=='!'
        if invert:
            op = op[1:]
        def odd(l):
            i = 0
            for v in l:
                i += 1 if v else -1
            return i==0
        v = {
            '&': all,
            '|': any,
            '^': odd,
            '': next
        }[op](vals)
        self.value = not v if invert else v
    @classmethod
    def build_circuit(cls,circuit):
        c = dict(map((lambda x:(x[0],Node(x[1].get("op","")))),circuit.items()))
        for n in circuit.keys():
            for cnxn in circuit[n].get("connections",[]):
                c[n].connections.add(c[cnxn])
        return c

if __name__=="__main__":
    circuit = Node.build_circuit({
        "n":{
            "op":Node.NAND,
            "connections":[
            "a",
            "b"
        ]
    },
        "a":{},
        "b":{}
    })

    circuit["a"].value = False
    circuit["b"].value = False
    circuit["n"]()
    print(circuit["n"].value)