我从一个视频复制了这个程序,我认为AndGate类中的__init__
函数是不必要的,因为AndGate类中没有要定义的新实例。有人能证实我的推理吗?在
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
您是正确的,
AndGate
类下的__init__
不是必需的。(在python中用这个特定的示例和一个要验证的新类进行了测试)。它与如何处理python中的继承有关:父类的__init__
函数被自动调用。在相关问题 更多 >
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