Учу питон, есть вот такой код
| Код |
__author__ = 'hz'
class LogicGate:
def __init__(self, n):
self.name = n
self.output = None
def getLabel(self):
return self.name
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 getPinA(self):
if self.pinA == None:
return int(input("Enter a pin A input for gate " + self.getLabel() + "--->"))
else:
return self.pinA.getFrom().getOutput()
def getPinB(self):
if self.pinB == None:
return int(input("Enter a pin B for gate " + self.getLabel() + "--->"))
else:
return self.pinB.getFrom().getOutput()
def setNextPin(self, source):
if self.pinA == None:
self.pinA = source
elif self.pinB == None:
self.pinB = source
else:
return RuntimeError("ERROR : No empty pins!")
class UnaryGate(LogicGate):
def __init__(self, n):
LogicGate.__init__(self, n)
self.pin = None
def getPin(self):
if self.pin == None:
return int(input("Enter a pin for gate " + self.getLabel() + "--->"))
else:
return self.pin.getFrom().getOutput()
def setNextPin(self, source):
if self.pin == None:
self.pin = source
else:
print("Cannot connect: no empty pin on this gate ")
class AndGate(BinaryGate):
def __init__(self, n):
BinaryGate.__init__(self, n)
def performGateLogic(self):
a = self.getPinA()
b = self.getPinB()
if a == 1 and b == 1:
return 1
else:
return 0
class OrGate(BinaryGate):
def __init__(self, n):
BinaryGate.__init__(self, n)
def performGateLogic(self):
a = self.getPinA()
b = self.getPinB()
if a == 0 and b == 0:
return 0
else:
return 1
class NotGate(UnaryGate):
def __init__(self, n):
UnaryGate.__init__(self, n)
def performGateLogic(self):
a = self.getPin()
if a == 0:
return 1
elif a == 1:
return 0
class Connector():
def __init__(self, fgate, tgate):
self.fromgate = fgate
self.togate = tgate
tgate.setNextPin(self)
def getFrom(self):
return self.fromgate
def getTo(self):
return self.togate
def main():
g1 = AndGate("G1")
g2 = AndGate("G2")
g3 = OrGate("G3")
g4 = NotGate("G4")
c1 = Connector(g1, g3)
c2 = Connector(g2, g3)
c3 = Connector(g3, g4)
print(g4.getOutput())
main()
|
Например в классе BinaryGate есть строка
| Код |
return self.pinA.getFrom().getOutput()
|
Метод getFrom() определен в классе Connector, ну вот КАК он может быть вызван у аттрибута pinA ?? |
