def clear(self):
"""Remove all nodes, edges, and attributes from the graph."""
self.edge_attr.clear()
self.node_attr.clear()
self.graph_attr.clear()
# now "close" existing graph and create a new graph
name=gv.agnameof(self.handle)
strict=self.strict
directed=self.directed
gv.agclose(self.handle)
self.handle=gv.agraphnew(name,strict,directed)
def close(self):
# may be useful to clean up graphviz data
# this should completely remove all of the existing graphviz data
gv.agclose(self.handle)