delete the entire contents of the current namespace

def do_delete(self, args):
        '''delete the entire contents of the current namespace'''
        namespace = self.config['namespace']
        if not args.assume_yes:
            response = raw_input('Delete everything in {0!r}?  Enter namespace: '
                                 .format(namespace))
            if response != namespace:
                self.stdout.write('not deleting anything\n')
                return
        self.stdout.write('deleting namespace {0!r}\n'.format(namespace))
        self.task_master.clear()