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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def execute(self):
 """Execute all actions, throwing an ExecutionException on failure. Catch the ExecutionException and call rollback() to rollback. """

        self._state_machine.transition_to_execute()
        for action in self._actions:
            self._executed_actions.append(action)
            self.execute_with_retries(action, lambda a: a.execute())
        self._state_machine.transition_to_execute_complete()