Highlighting

You can highlight some graph nodes.

>>> class Node(object):
...     def __init__(self, *neighbours):
...         self.neighbours = list(neighbours)
>>> a = Node()
>>> b = Node(a)
>>> c = Node(b)
>>> d = Node(c)
>>> a.neighbours.append(d)

>>> import objgraph
>>> objgraph.show_backrefs(a, max_depth=15,
...     extra_ignore=[id(locals())],
...     highlight=lambda x: isinstance(x, Node),
...     filename='highlight.png') # doctest: +NODES_VARY
Graph written to ....dot (12 nodes)
Image generated as highlight.png