<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def verbose(self):
 """ Make it the verbose log. A verbose log can be only shown when user want to see more logs. It works as:: log.verbose.warn('this is a verbose warn') log.verbose.info('this is a verbose info') """


        log = copy.copy(self)
        log._is_verbose = True
        return log