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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 refreshCompositeOf(self, single_keywords, composite_keywords, store=None, namespace=None):
 """Re-check sub-parts of this keyword. This should be called after the whole RDF was processed, because it is using a cache of single keywords and if that one is incomplete, you will not identify all parts. """

        def _get_ckw_components(new_vals, label):
            if label in single_keywords:
                new_vals.append(single_keywords[label])
            elif ('Composite.%s' % label) in composite_keywords:
                for l in composite_keywords['Composite.{0}'.format(label)].compositeof:  # noqa
                    _get_ckw_components(new_vals, l)
            elif label in composite_keywords:
                for l in composite_keywords[label].compositeof:
                    _get_ckw_components(new_vals, l)
            else:
                # One single or composite keyword is missing from the taxonomy.
                # This is due to an error in the taxonomy description.
                message = "The composite term \"%s\""\
                          " should be made of single keywords,"\
                          " but at least one is missing." % self.id
                if store is not None:
                    message += "Needed components: %s"\
                               % list(store.objects(self.id,
                                                    namespace["compositeOf"]))
                message += " Missing is: %s" % label
                raise TaxonomyError(message)

        if self.compositeof:
            new_vals = []
            try:
                for label in self.compositeof:
                    _get_ckw_components(new_vals, label)
                self.compositeof = new_vals
            except TaxonomyError as err:
                # the composites will be empty
                # (better than to have confusing, partial matches)
                self.compositeof = []
                current_app.logger.error(err)