Question

我从视频中复制此程序，我认为AndGate类中的__init__函数是不必要的，因为在AndGate类中没有要定义的新实例。有人可以证实我的推理吗？

class LogicGate:
    def __init__(self,n):
        self.label = n
        self.output = None

    def getLabel(self):
        return self.label

    def getOutput(self):
        self.output = self.performGateLogic()
        return self.output


class BinaryGate(LogicGate):
    def __init__(self,n):
        LogicGate.__init__(self,n)
        self.pinA = None
        self.pinB = None
    def SetNextPin(self,source):
        if self.pinA == None:
            self.pinA = source #pin a became a instance of connector class, conntector.gate.pinA
        else:
            if self.pinB == None:
                self.pinB = source
            else:
               raise RuntimeError("Error: NO EMPTY PINS")

    def getA(self):
        if self.pinA == None:
            return int(input("Enter Pin A input for gate "+self.getLabel()+"-->"))
        else:
            return self.pinA.getfg().getOutput()

    def getB(self):
        if self.pinB == None:
            return int(input("Enter Pin B input for gate "+self.getLabel()+"-->"))
        else:
            return self.pinB.getfg().getOutput()


class AndGate(BinaryGate):
    def __init__(self,n):
        BinaryGate.__init__(self,n)

    def performGateLogic(self):
        a = self.getA()
        b = self.getB()

        if a == 1:
            if a == b:
                return 1
        else:
            return 0

Answer 1

你是对的，__init__类下的AndGate不是必需的。（使用此特定示例在python中进行测试，并验证新类）。它与如何处理python中的继承有关：自动调用父类的__init__函数。

Python逻辑电路

1 个答案: