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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 db_aws_list_regions(self):
        ''' List AWS DB regions '''
        regions = self.db_services.list_regions()
        if regions != []:
            print "Avaliable AWS regions:"
        for reg in regions:
            print '\t' + reg,
            if reg == self.db_services.get_region():
                print "(currently selected)"
            else:
                print ''