main.py

L = []

n = int(input("Enter the number of elements in the list: "))

for k in range(n):
    a = input("Enter the element to be added in the list: ")
    L.append(a)

print("List created")
print("The list is: ",L)

print("1. Append an element")
print("2. Insert an element")
print("3. Modify an existing element by accepting it's position")
print("4. Delete an existing element from its position")
print("5. Delete an existing element with a given value")
print("6. Sort the list in ascending order")
print("7. Sort the list in descending order")
print("8. Display the list")

print("Do you want to continue?? (Y/n)")

print("Program Starting")

s_l = input("\n\nEnter your selection: ")

if s_l == '1':
    print("You selected to append an element")
    b = input("Enter the element to be appended into the list: ")
    L.append(b)
    print("\n List updated")
    print("The new list is: ",L)

elif s_l == '2':
    print("You selected to insert an element")
    d = int(input("Enter the position of the element in the list: "))
    c = input("Enter the element to be inserted into the list: ")
    L.insert(d,c)
    print("\n List updated")
    print("The new list is: ",L)

elif s_l == '3':
    print("You selected to modify an existing element by accepting it's position")
    e = int(input("Enter the position of the element: "))
    f = input("Enter the element to be added into the list by replacing the previous one: ")
    L[e] = f
    print("List updated")
    print("The new list is: ",L)

elif s_l == '4':
    print("You selected to delete an existing element from it's position")
    g = int(input("Enter the position of the element: "))
    L.pop(g)
    print("List updated")
    print("The new list is: ",L)

elif s_l == '5':
    print("You selected to delete an existing element with a given value")
    h = input("Enter the value of the element to be removed: ")
    L.remove(h)
    print("List updated")
    print("The new list is: ",L)

elif s_l == '6':
    print("You selected to sort the list in ascending order")
    i = L.sort()
    print("List updated")
    print("The new list is: ",i)

elif s_l == '7':
    print("You selected to sort the list in descending order")
    j = L.sort(reverse=True)
    print("List updated")
    print("The new list is: ",j)

elif s_l == '8':
    print("You selected to display the list")
    print("The list is: ",L)

elif s_l == 'Y':
    print("You selected to continue the program")
    print("Continuing")

elif s_l == 'n':
    print("You selected to quit")
    print("Thank you for using me")
    print("Program ending")
    quit