How to use the ontospy.extras.hacks.sketch.Sketch function in ontospy

if False:
			onto = Model(argv[0])
			for x in onto.get_classes():
				print(x)
			onto.buildPythonClasses()
			s = Sketch()

	else:

		intro = """Good morning. Ready to Turtle away. Type docs() for help."""
		# idea: every time provide a different ontology maxim!

		def docs():
			print("\n".join([x.strip() for x in Sketch.__doc__.splitlines()]))

		default_sketch = Sketch()

		def add(text=""):
			default_sketch.add(text)
		def show(aformat=None):
			if aformat:
				default_sketch.show(aformat)
			else:
				default_sketch.show()
		def bind(prefixTuple):
			default_sketch.bind(prefixTuple)
		def clear():
			default_sketch.clear()
		def omnigraffle():
			default_sketch.omnigraffle()

September 18, 2014: if an arg is passed, we visualize it
	Otherwise a simple shell gets opened.

	"""

	print("Ontospy " + ontospy.VERSION)
	ontospy.get_or_create_home_repo()

	if argv:
		print("Argument passing not implemented yet")
		if False:
			onto = Model(argv[0])
			for x in onto.get_classes():
				print(x)
			onto.buildPythonClasses()
			s = Sketch()

	else:

		intro = """Good morning. Ready to Turtle away. Type docs() for help."""
		# idea: every time provide a different ontology maxim!

		def docs():
			print("\n".join([x.strip() for x in Sketch.__doc__.splitlines()]))

		default_sketch = Sketch()

		def add(text=""):
			default_sketch.add(text)
		def show(aformat=None):
			if aformat:
				default_sketch.show(aformat)

def docs():
			print("\n".join([x.strip() for x in Sketch.__doc__.splitlines()]))

def __init__(self, text=""):
		super(Sketch, self).__init__()

		self.rdflib_graph = rdflib.Graph()
		self.namespace_manager = NamespaceManager(self.rdflib_graph)

		self.SUPPORTED_FORMATS = ['xml', 'n3', 'turtle', 'nt', 'pretty-xml', 'dot']

		PREFIXES = [
					("", "http://this.sketch#"),
					("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#"),
					("rdfs", "http://www.w3.org/2000/01/rdf-schema#"),
					("xml", "http://www.w3.org/XML/1998/namespace"),
					("xsd", "http://www.w3.org/2001/XMLSchema#"),
					('foaf', "http://xmlns.com/foaf/0.1/"),
					("skos", "http://www.w3.org/2004/02/skos/core#"),
					("owl", "http://www.w3.org/2002/07/owl#"),
					]