Best way to do this ?

[miguelsmuller]

I have the following code snippet...
With it I separate and later put together a ttl again.

graph = Graph()

for file in os.listdir(PATH):
    if file.endswith(".ttl"):
        graph.parse(os.path.join(PATH, file))

graph_class = Graph()
graph_properties = Graph()

graph_class += graph.triples((None, RDF.type, OWL.Class))
graph_properties += graph.triples((None, RDF.type, OWL.ObjectProperty))

graph_full = graph_class + graph_properties

I keep looking at the code and I don't like the aesthetics very much.
Is there any other way to do this, that is, build a graph with only the existing classes and properties in the original?