To preprocess the DOT source of a .Graph or .Digraph with the unflatten preprocessor (manpage, PDF), use the ~.Graph.unflatten method.
>>> import graphviz # doctest: +NO_EXE
>>> w = graphviz.Digraph('wide')
>>> w.edges(('0', str(i)) for i in range(1, 10))
>>> doctest_mark_exe() # skip this line
>>> w.view() # doctest: +SKIP
Hint
~.Graph.unflatten improves the aspect ratio of graphs with many leaves or disconnected nodes.
>>> u = w.unflatten(stagger=3) # doctest: +NO_EXE
>>> doctest_mark_exe() # skip this line
>>> u.view() # doctest: +SKIP
The method returns a .Source object that you can ~.Source.render, ~.Source.view, etc. with the same basic API as .Graph or .Digraph objects (minus modification, see details below <using-raw-dot>).
>>> u = w.unflatten(stagger=2) # doctest: +NO_EXE >>> u # doctest: +ELLIPSIS <graphviz.sources.Source object at 0x...>
>>> doctest_mark_exe() # skip this line
>>> u.view() # doctest: +SKIP
