Update5.py

def menu():
  print("1. Insert Item at the Beginning")
  print("2. Insert Item at the End")
  print("3. Insert Item at Any Position")
  print("4. Delete Item at the Beginning")
  print("5. Delete Item at the End")
  print("6. Delete Item at Any Position")
  print("7. Delete Item by Item Code")
  print("8. Delete Item by Item Category")
  print("9. Sort Item by Item Code (Ascending)")
  print("10. Sort Item by Price (Descending)")
  print("11. Search Item by Code")
  print("12. Search Item by Type")
  print("13. Search Item by Quantity (from and to quantity)")
  print("14. Update Item by Code")
  print("15. Display")
  print("16. Exit")
  print()

menu()
SIZE = 3
ITEM_CODE = [None] * SIZE
ITEM_DESCRIPTION = [None] * SIZE
ITEM_PRICE = [None] * SIZE
ITEM_QUANTITY = [None] * SIZE
ITEM_CATEGORY = [None] * SIZE
index = 0
while index < SIZE:

  choose = input("Enter your Choice : ")
  print()
  
  # Push Item
  if choose == '1':
    
    flag = False
    # Shift the elements of the list one position to the right, starting from the last element and working backwards, until the element at index 0 is reached. The element at index 0 will not be shifted, as it will be replaced by the new element.
    i = SIZE - 1
    count = 0
    while i > 0 and count < SIZE - 1:
      ITEM_CODE[i] = ITEM_CODE[i-1]
      i -= 1
      count += 1
    ITEM_CODE[0] = input("Enter Item Code : ")
    
    ctr = 0
    while ctr < index:
      if ITEM_CODE[ctr] == ITEM_CODE[index]:
        print("Item Code Already Exist.")
        break
      else:
        ctr += 1
        
    if ctr == index:
    # Shift the elements of the list one position to the right, starting from the last element and working backwards, until the element at index 0 is reached. The element at index 0 will not be shifted, as it will be replaced by the new element.
      i = SIZE - 1
      count = 0
      while i > 0 and count < SIZE - 1:
        ITEM_DESCRIPTION[i] = ITEM_DESCRIPTION[i-1]
        ITEM_PRICE[i] = ITEM_PRICE[i-1]
        ITEM_QUANTITY[i] = ITEM_QUANTITY[i-1]
        ITEM_CATEGORY[i] = ITEM_CATEGORY[i-1]
        i -= 1
        count += 1
      ITEM_DESCRIPTION[0] = input("Enter Item Description : ")
      ITEM_PRICE[0] = float(input("Enter Item Price : "))
      ITEM_QUANTITY[0] = int(input("Enter Item Quantity : "))
      ITEM_CATEGORY[0] = input("Enter Item Category : ").upper()
      flag = True
      index += 1

    if flag:
      print("New Item Added.")
      
  # Append Item
  elif choose == '2':
    
    flag = False
    ITEM_CODE[index] = input("Enter Item Code : ")
    ctr = 0
    while ctr < index:
      if ITEM_CODE[ctr] == ITEM_CODE[index]:
        print("Item Code Already Exist.")
        break
      else:
        ctr += 1
    if ctr == index:
      ITEM_DESCRIPTION[index] = input("Enter Item Description : ")
      ITEM_PRICE[index] = float(input("Enter Item Price : "))
      ITEM_QUANTITY[index] = int(input("Enter Item Quantity : "))
      ITEM_CATEGORY[index] = input("Enter Item Category : ").upper()
      flag = True
      index += 1

    if flag:
      print("New Item Added.")

  # Insert at Specified Position
  elif choose == '3':

    flag = False
    position = int(input("Position: "))
    if position >= SIZE or position < 0:
      print("Index out of range. Please enter a valid position.")
      # index -= 1
    else:
      # num = int(input("Enter number: "))
      # Shifts all the elements of the list starting from pos one position to the right in order to make room for the new value. It does this by assigning the value of each element to the element that comes after it.
      i = SIZE-1
      while i > position:
        ITEM_CODE[i] = ITEM_CODE[i-1]
        ITEM_DESCRIPTION[i] = ITEM_DESCRIPTION[i-1]
        ITEM_PRICE[i] = ITEM_PRICE[i-1]
        ITEM_QUANTITY[i] = ITEM_QUANTITY[i-1]
        ITEM_CATEGORY[i] = ITEM_CATEGORY[i-1]
        i -= 1

      if index == 0:
        position = 0
      if position < index+1:
        ITEM_CODE[position] = input("Enter Item Code : ")
        ctr = 0
        while ctr < index:
          if ITEM_CODE[ctr] == ITEM_CODE[index]:
            print("Item Code Already Exist.")
            break
          else:
            ctr += 1
        if ctr == index:
          ITEM_DESCRIPTION[position] = input("Enter Item Description : ")
          ITEM_PRICE[position] = float(input("Enter Item Price : "))
          ITEM_QUANTITY[position] = int(input("Enter Item Quantity : "))
          ITEM_CATEGORY[position] = input("Enter Item Category : ").upper()
          flag = True
          index += 1
      else:
        print("Index out of range. Please enter a valid position.")
    if flag:
      print("New Item Added.")

  # Delete at Beginning
  elif choose == '4':
    if index == 0:
      print("List is Empty")
    else:
      found = False
      i = 0
      while i < SIZE:
        if i == 0:
          j = i
          while j < SIZE-1:
            ITEM_CODE[j] = ITEM_CODE[j+1]
            ITEM_DESCRIPTION[j] = ITEM_DESCRIPTION[j+1]
            ITEM_PRICE[j] = ITEM_PRICE[j+1]
            ITEM_QUANTITY[j] = ITEM_QUANTITY[j+1]
            ITEM_CATEGORY[j] = ITEM_CATEGORY[j+1]
            j += 1
          
          ITEM_CODE[index] = None
          ITEM_DESCRIPTION[index] = None
          ITEM_PRICE[index] = None
          ITEM_QUANTITY[index] = None
          ITEM_CATEGORY[index] = None
          found = True
          index -= 1
        i += 1
      if found:
        print("Item Deleted")
      else:
        print("Item Not Found")

  # Delete at the End
  elif choose == '5':
    if index == 0:
      print("List is Empty")
    else:
      found = False
      i = 0
      while i < SIZE:
        if i == SIZE-1:
          j = i
          while j < SIZE-1:
            ITEM_CODE[j] = ITEM_CODE[j+1]
            ITEM_DESCRIPTION[j] = ITEM_DESCRIPTION[j+1]
            ITEM_PRICE[j] = ITEM_PRICE[j+1]
            ITEM_QUANTITY[j] = ITEM_QUANTITY[j+1]
            ITEM_CATEGORY[j] = ITEM_CATEGORY[j+1]
            j += 1
          
          ITEM_CODE[index] = None
          ITEM_DESCRIPTION[index] = None
          ITEM_PRICE[index] = None
          ITEM_QUANTITY[index] = None
          ITEM_CATEGORY[index] = None
          found = True
          index -= 1
        i += 1
      if found:
        print("Item Deleted")
      else:
        print("Item Not Found")

  # Delete at the Specified Position
  elif choose == '6':
    if index == 0:
      print("List is Empty")
    else:
      deletePosition = int(input("Delete Postion : "))
      found = False
      i = 0
      while i < SIZE:
        if deletePosition == i:
          j = i
          while j < SIZE-1:
            ITEM_CODE[j] = ITEM_CODE[j+1]
            ITEM_DESCRIPTION[j] = ITEM_DESCRIPTION[j+1]
            ITEM_PRICE[j] = ITEM_PRICE[j+1]
            ITEM_QUANTITY[j] = ITEM_QUANTITY[j+1]
            ITEM_CATEGORY[j] = ITEM_CATEGORY[j+1]
            j += 1
          if i < index:
            ITEM_CODE[index] = None
            ITEM_DESCRIPTION[index] = None
            ITEM_PRICE[index] = None
            ITEM_QUANTITY[index] = None
            ITEM_CATEGORY[index] = None
            found = True
            index -= 1
        i += 1
      if found:
        print("Item Deleted")
      else:
        print("Item Not Found")

  # Delete Item by Code
  elif choose == '7':
    if index == 0:
      print("List is Empty")
    else:
      deleteItemCode = input("Delete Item by Code : ")
      found = False
      i = 0
      while i < SIZE:
        if deleteItemCode == ITEM_CODE[i]:
          j = i
          while j < SIZE-1:
            ITEM_CODE[j] = ITEM_CODE[j+1]
            ITEM_DESCRIPTION[j] = ITEM_DESCRIPTION[j+1]
            ITEM_PRICE[j] = ITEM_PRICE[j+1]
            ITEM_QUANTITY[j] = ITEM_QUANTITY[j+1]
            ITEM_CATEGORY[j] = ITEM_CATEGORY[j+1]
            j += 1
          
          ITEM_CODE[index] = None
          ITEM_DESCRIPTION[index] = None
          ITEM_PRICE[index] = None
          ITEM_QUANTITY[index] = None
          ITEM_CATEGORY[index] = None
          found = True
          index -= 1
        i += 1
      if found:
        print("Item Deleted")
      else:
        print("Item Not Found")

  # Delete Item by Category
  elif choose == '8':
    if index == 0:
      print("List is Empty")
    else:
      deleteItemCategory = input("Delete Item by Category : ").upper()
      found = False
      i = 0
      while i < SIZE:
        if deleteItemCategory == ITEM_CATEGORY[i]:
          j = i
          while j < SIZE-1:
            ITEM_CODE[j] = ITEM_CODE[j+1]
            ITEM_DESCRIPTION[j] = ITEM_DESCRIPTION[j+1]
            ITEM_PRICE[j] = ITEM_PRICE[j+1]
            ITEM_QUANTITY[j] = ITEM_QUANTITY[j+1]
            ITEM_CATEGORY[j] = ITEM_CATEGORY[j+1]
            j += 1
          
          ITEM_CODE[index] = None
          ITEM_DESCRIPTION[index] = None
          ITEM_PRICE[index] = None
          ITEM_QUANTITY[index] = None
          ITEM_CATEGORY[index] = None
          found = True
          index -= 1
        i += 1
      if found:
        print("Item Deleted")
      else:
        print("Item Not Found")
  
  # Sort Item by Code (Ascending)
  elif choose == '9':
    sorted = False
    while True:
      flag = False
      j = 0
      while j < index-1:
        if ITEM_CODE[j] > ITEM_CODE[j+1]:
          # Swap for Item Code
          tempItemCode = ITEM_CODE[j]
          ITEM_CODE[j] = ITEM_CODE[j+1]
          ITEM_CODE[j+1] = tempItemCode
  
          # Swap for Item Description
          tempItemDescription = ITEM_DESCRIPTION[j]
          ITEM_DESCRIPTION[j] = ITEM_DESCRIPTION[j+1]
          ITEM_DESCRIPTION[j+1] = tempItemDescription
  
          # Swap for Item Price
          tempItemPrice = ITEM_PRICE[j]
          ITEM_PRICE[j] = ITEM_PRICE[j+1]
          ITEM_PRICE[j+1] = tempItemPrice
  
          # Swap for Item Quantity
          tempItemQuantity = ITEM_QUANTITY[j]
          ITEM_QUANTITY[j] = ITEM_QUANTITY[j+1]
          ITEM_QUANTITY[j+1] = tempItemQuantity
  
          # Swap for Item Category
          tempItemCategory = ITEM_CATEGORY[j]
          ITEM_CATEGORY[j] = ITEM_CATEGORY[j+1]
          ITEM_CATEGORY[j+1] = tempItemCategory
          flag = True
          sorted = True
        j += 1
      if not flag:
        break
    if sorted:
      print("Item Code Sorted (Ascending)")

  # Sort Item by Price (Descending)
  elif choose == '10':
    sorted = False
    while True:
      flag = False
      j = 0
      while j < index-1:
        if ITEM_PRICE[j] < ITEM_PRICE[j+1]:
          # Swap for Item Code
          tempItemCode = ITEM_CODE[j]
          ITEM_CODE[j] = ITEM_CODE[j+1]
          ITEM_CODE[j+1] = tempItemCode

          # Swap for Item Description
          tempItemDescription = ITEM_DESCRIPTION[j]
          ITEM_DESCRIPTION[j] = ITEM_DESCRIPTION[j+1]
          ITEM_DESCRIPTION[j+1] = tempItemDescription

          # Swap for Item Price
          tempItemPrice = ITEM_PRICE[j]
          ITEM_PRICE[j] = ITEM_PRICE[j+1]
          ITEM_PRICE[j+1] = tempItemPrice

          # Swap for Item Quantity
          tempItemQuantity = ITEM_QUANTITY[j]
          ITEM_QUANTITY[j] = ITEM_QUANTITY[j+1]
          ITEM_QUANTITY[j+1] = tempItemQuantity

          # Swap for Item Category
          tempItemCategory = ITEM_CATEGORY[j]
          ITEM_CATEGORY[j] = ITEM_CATEGORY[j+1]
          ITEM_CATEGORY[j+1] = tempItemCategory
          flag = True
          sorted = True
        j += 1
      if not flag:
        break
    if sorted:
      print("Item Price Sorted (Descending)")

  # Display All
  elif choose == '15':
    if index == 0:
      print("List is Empty")
    else:
      print()
      ctr1 = 0
      while ctr1 < index:
        print(ITEM_CODE[ctr1], ITEM_DESCRIPTION[ctr1], ITEM_PRICE[ctr1], ITEM_QUANTITY[ctr1], ITEM_CATEGORY[ctr1])
        ctr1 += 1

  # Exit Section
  elif choose == '16':
    print("Program Terminated.")
    break

  else:
    print("Invalid Input.")
  print()
if index == SIZE:
  print("Item Storage is Full.")