def get_graph_letter(letter):
global count
graph = Graph()
node1 = Node(count, 'initial')
count += 1
node2 = Node(count, 'final')
count += 1
node1.add_edge(Edge(node1, node2, letter))
graph.add_node(node1)
graph.add_node(node2)
return get_initial_final(graph)
def get_copy_graph(graph):
copy = Graph()
for n in graph.nodes:
node = Node(n.name, n.category)
copy.add_node(node)
