# Made by Nitin Kumar # using purely python language # and list 'data structure' type # comments are added for clear understanding of every code used # open source for learning # -----------------------------DATA STRUCTURE IN PYTHON USING LIST---------------------------------------- # declaring & initializing list named 'tree' tree=[] # option by default 'y' ans = 'Y' # loop to constantly ask what to do while ans == 'Y' or ans == 'y': # FUNCTION USED IN THIS DATA STRUCTURE # function to insert multiple items in lists def insert_items(): nol = int(input("Enter the number of items to fill in the tree:\t")) for i in range(0,nol): i = int(input("Enter the items:\t")) tree.append(i) # function to display items in the list def display_items(): if tree == []: print("You haven't added any item !!") else: print("The tree made is",tree) # funtion to add one item to the list def add_item(): index = int(input("Enter the index of element after which you want to add item:\t")) item = int(input("Enter the value:\t")) tree.insert(index,item) # function to delete item in list # function to delete item when value of item to be deleted is known def delete_item_value(): value = int(input("Enter the value of element which you want to delete:\t")) tree.remove(value) # function to delete item when index of item to be deleted is known def delete_item_index(): index = int(input("Enter the index of element which you want to delete:\t")) tree.pop(index) # MAIN THING TO BE DISPLAYED EVERYTIME YOU TYPE 'Y' OR 'y' TO DO TASKS INSIDE THE TREE # 1. ADD MULTIPLE ITEMS IN TREE # 2. DISPLAY ITEMS # 3. ADD ONE ITEM ONLY # 4. DELETE ITEM IF # 41. VALUE OF ITEM TO BE DELETED IS KNOWN # 42. INDEX OF ITEM TO BE DELETED IS KNOWN # 5. EXIT try: print("\n\n========================================") option = int(input("What do you want to do ? \n1. Add multiple items\n2. Display items\n3. Add one item\n4. Delete item when\n\t 41. You know the value of item\n\t 42. You know the index of item\n5. Exit\n\nYOUR ANSWER HERE\t")) print("========================================\n\n") # CONDITIONS TO BE FOLLOWED FOR SUCCESSFUL EXECUTION if option == 1: insert_items() elif option == 2: display_items() elif option == 3: add_item() elif option == 41: delete_item_value() elif option == 42: delete_item_index() elif option == 5: exit() else: print("Invalid option selected , Try again !!") except: print("Please choose number from 1 to 5") #Question asked for next iteration ans = input("Do you want to continue ? ( type 'Y' or 'y' to continue )\t")