#!/usr/bin/env python3

"""
example usage of the Graphviz Python module
"""

import gv

g = gv.digraph("G")
print(gv.setv(g, "aaa", "xxx"))
print(gv.getv(g, "aaa"))
n = gv.node(g, "hello")
print(gv.getv(n, "label"))
print(gv.setv(n, "aaa", "xxx"))
print(gv.getv(n, "aaa"))
m = gv.node(g, "world")
print(gv.getv(m, "aaa"))
e = gv.edge(n, m)
print(gv.setv(e, "aaa", "xxx"))
print(gv.getv(e, "aaa"))
gv.rm(e)
gv.rm(m)
gv.rm(n)
gv.rm(g)

g = gv.readstring("digraph G {a->b}")
gv.rm(g)

g = gv.read("hello.gv")
gv.layout(g, "dot")
gv.render(g, "png", "hello.png")
gv.rm(g)