def finish(self):
        """Call finish() on each attached module"""
        if self.anybar: self.anybar.change("purple")

        finish_blob = Blob()
        for module in self.modules:
            if hasattr(module, 'pre_finish'):
                log.info("Finishing {0}".format(module.name))
                start_time = timer()
                start_time_cpu = process_time()
                finish_blob[module.name] = module.pre_finish()
                self._timeit[module]['finish'] = timer() - start_time
                self._timeit[module]['finish_cpu'] = \
                    process_time() - start_time_cpu
            else:
                log.info("Skipping function module {0}".format(module.name))
        self._timeit['finish'] = timer()
        self._timeit['finish_cpu'] = process_time()
        self._print_timeit_statistics()
        self._finished = True

        if self.anybar: self.anybar.change("green")
        return finish_blob
Call finish() on each attached module