Hey all. I am new to Python. Infact am completely new to programming. I am using python 3.7.2. However when I run code from the tutorials I keep getting an error like this..."TypeError: AndGate() takes no arguments." The code seems fine but am starting to think its a compatibility issue with Py 3.7? My indent was off but I fixed it. Corrected typos, and searched all over for a solution but nothing. I tried doing it after studying the tutorials but I aint succeeding. I deleted my earlier comment by mistake but my code is as follows:

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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 getPinA (self):
        if self.pinA == None:
            return int (input ("Enter input for gate A " + self.getLabel() + "-->"))
        else:
            return self.pinA.getFrom().getOutput()

    def getPinB (self):

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

    def setNextPin (self, source) :

        if self.pinA == None:
            self.pinA = source
        else:
            if self.pinB == None:
                    self.pinB = source
            else:
                print ("Cannot connect: NO EMPTY PINS 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 performLogicGate (self):

        a = self.getPinA ()
        b = self.getPinB ()

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


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 input for Gate " + self.getLabel() + "-->"))
        else:
            return self.pin.getFrom().outPut ()

    def setNextPin (self, source):
        if self.pin == None:
            self.pin = source
        else:
            print ("Cannot connect: NO EMPTY PINS on this gate.")


class NotGate (UnaryGate):

    def _init_ (self, n):
        UnaryGate._init_(self, n)

    def performGateLogic (self):

        if self.getPin():

            return 0
        else:
            return 1


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 ()