<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def change_event_actions(self, handler, actions):
 """ This allows the client to change the actions for an event, in the case that there is a desire for slightly different behavior, such as reasigning keys. handler - the handler object that the desired changes are made to. actions - The methods that are called when this handler is varified against the current event. """

        if not isinstance(handler, Handler):
            raise TypeError("given object must be of type Handler.")
        if not self.remove_handler(handler):
            raise ValueError("You must pass in a valid handler that already exists.")

        self.add_handler(handler.type, actions, handler.params)
        self.event = handler.event