Valid Locking Schedule

Write a function, named $$validate$\_$locking$\_$schedule$$ that takes a list of Actions $($see below$)$ as its only parameter. This function doesn$$t return anything, but instead raises exceptions if the schedule is invalid $($according to legality of schedules, two$-$phased locking, and consistency of transactions$).$ Be sure to validate the actions in that order. The exception classes are already defined for you in your starter solution.

The Action class is a simple class with attributes denoting the id of the database object $($region$),$ the id of the transaction the action takes place in$,$ and the type of action $($if the action was a read, write, lock, or unlock$).$

You can assume the action class$$s object$\_$ and transaction attributes are strings or integers $($types which support equality$)$ and the type is an UPPERCASE string.