A LibraryItem object represents a library item that a patron can check out from a library. It has six data members:

library$\_$item$\_$id $-$ a unique identifier for a LibraryItem $-$ you can assume uniqueness, you don't have to enforce it

title $-$ cannot be assumed to be unique

location $-$ a LibraryItem can be $"$ON$\_$SHELF", $"$ON$\_$HOLD$\_$SHELF", or "CHECKED$\_$OUT"

checked$\_$out$\_$by $-$ refers to the Patron who has it checked out $($if any$)$

requested$\_$by $-$ refers to the Patron who has requested it $($if any$)$; a LibraryItem can only be requested by one Patron at a time

date$\_$checked$\_$out $-$ when a LibraryItem is checked out, this will be set to the current$\_$date of the Library

The LibraryItem methods are:

init method $-$ takes a library item ID and title as parameters; checked$\_$out$\_$by and requested$\_$by should be initialized to None; a new LibraryItem's location should be on the shelf

get$\_$location returns the Library Item's location

other get and set methods as needed