Wsrtjtyk

My problem

in init I declare two list variables that are called nlist and rlist.

Then in method add_neighour I am appending object (router2) named router2.__routername to the list of object called self.nlist.

class Router:



    def __init__(self, routername):



        self.__routername = routername



        self.nlist = 

        self.rlist = 



    def print_info(self):



        print(self.nlist)



        print("  ", self.__routername, sep="")

        print("    N: ", ", ".join(sorted(self.nlist)), sep="")

        print("    R: ", ", ".join(sorted(self.rlist)), sep="")



    def add_neighbour(self, router2):

        self.nlist.append(router2.__routername)



        print(self.nlist)

I'm calling the code inside the while True that waits for a specific commmand:

Command P is for printing info

    if command == "P":

        routername = input("Enter router name: ")



        if routername not in mydict:

            print("Router was not found.")

        else:

            router = Router(routername)

            router.print_info()

Command C is for chaining two routers together. (for example appending router2s name router2.__routername to the neighbour list self.nlist of router1.

This happens class Router inside the method add_neighbour that takes another router as parameter.

    elif command == "C":

        router1 = input("Enter 1st router: ")

        router2 = input("Enter 2nd router: ")



        router1 = Router(router1)

        router2 = Router(router2)



        router1.add_neighbour(router2)

        router2.add_neighbour(router1)

The appending goes fine and when I print(self.nlist) at the end it shows up that the list has been updated with the appended element I wanted. However, when calling the print_info function and trying to print the sorted(self.nlist) It prints an empty list.

I have no clue why. Should I declare the object specific list in a different way/place?

or

append values to the list differently?

my goal is to: succesfully print self.nlist inside the print_info method. Succesfully printing meaning that it prints something else than an empty list.

I tried looking for answers from several posts. Sorry if this post is duplicate and horribly written.

The whole code: (in progress as you can see...)

class Router:



    def __init__(self, routername):



        self.__routername = routername



        self.nlist = 

        self.rlist = 



    def print_info(self):



        print(self.nlist)



        print("  ", self.__routername, sep="")

        print("    N: ", ", ".join(sorted(self.nlist)), sep="")

        print("    R: ", ", ".join(sorted(self.rlist)), sep="")



    def add_neighbour(self, router2):

        self.nlist.append(router2.__routername)



        print(self.nlist)





def main():

    mydict = {}



    routerfile = input("Network file: ")



    while True:

        command = input("> ")

        command = command.upper()



        if command == "P":

            routername = input("Enter router name: ")



            if routername not in mydict:

                print("Router was not found.")

            else:

                router = Router(routername)

                router.print_info()





            pass



        elif command == "PA":

            pass



        elif command == "S":

            pass



        elif command == "C":

            router1 = input("Enter 1st router: ")

            router2 = input("Enter 2nd router: ")



            router1 = Router(router1)

            router2 = Router(router2)



            router1.add_neighbour(router2)

            router2.add_neighbour(router1)



            pass



        elif command == "RR":

            pass



        elif command == "NR":

            routername = input("Enter a new name: ")

            router = Router(routername)

            if routername not in mydict:

                mydict[routername] = router

            else:

                print("Name is taken.")



            pass



        elif command == "NN":

            pass



        elif command == "Q":

            print("Simulator closes.")

            return



        else:

            print("Erroneous command!")

            print("Enter one of these commands:")

            print("NR (new router)")

            print("P (print)")  

            print("C (connect)")

            print("NN (new network)")

            print("PA (print all)")

            print("S (send routing tables)")

            print("RR (route request)")

            print("Q (quit)")



main()