cosmoSys » Issues

Look at this:

For strings that should literally begin with '<' and end with '>', use the graphviz.nohtml() function to disable the special meaning of angled parenthesis and apply normal quoting/escaping:
d = graphviz.Digraph('diamond', format='svg')

d.node('diamond', label=graphviz.nohtml('<>'))
print(d.source)

digraph diamond {
diamond [label="<>"]
}
doctest_mark_exe() # skip this line

d.render(directory='doctest-output').replace('\', '/')
'doctest-output/diamond.gv.svg'