add_link(node_list, link_list, u, 0, u.variable, 0)
if hasattr(u, 'next_functions'):
- i = 0
- for v, j in u.next_functions:
+ for i, (v, j) in enumerate(u.next_functions):
fill_graph_lists(v, node_labels, node_list, link_list)
add_link(node_list, link_list, u, i, v, j)
- i += 1
######################################################################