python_Queqe

 

class Queqe():

    q = []

    def Is_empty(self):

        if self.q == []:

            print("It is empty")

            return True

        else:

            return False

    def Equeqe(self, data):

        self.q.append(data)

        print("Data is added\n")

        print(self.q)

    def Display(self):

        if self.Is_empty == True:

            print("It is Empty")

        else:

            print(self.q)

    def Dqueqe(self):

        # here i am poping the frist element, means the value with index 0

        if self.Is_empty == True:

            print("It is Empty")

        else:

            self.q.pop(0)

            print(self.q)

while True:

    obj = Queqe()

    print(" \n 1 for Empty queqe checking.\n"

          "2 for display\n"

          "3 for enqueue\n"

          "4 for dqueue"

          )

    choice = int(input(" Enter a choice : "))

    if choice == 1:

        obj.Is_empty()

    elif choice == 3:

        choice = int(input(" Enter a data"))

        obj.Equeqe(choice)

    elif choice == 2:

        obj.Display()

    elif choice == 4:

        obj.Dqueqe()

    else:

        print("Invalid input")