#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
A simple example to create a graphviz dot file and draw a graph.

"""
#    Copyright (C) 2006 by 
#    Aric Hagberg <hagberg@lanl.gov>
#    Dan Schult <dschult@colgate.edu>
#    Manos Renieris, http://www.cs.brown.edu/~er/
#    Distributed with BSD license.     
#    All rights reserved, see LICENSE for details.

from __future__ import absolute_import
from __future__ import unicode_literals
from __future__ import print_function
from __future__ import division

__author__ = """Aric Hagberg (hagberg@lanl.gov)"""

import pygraphviz as pgv

A=pgv.AGraph()

A.add_edge(1,2)
A.add_edge(2,3)
A.add_edge(1,3)

print(A.string()) # print to screen
print("Wrote simple.dot")
A.write('simple.dot') # write to simple.dot

B=pgv.AGraph('simple.dot') # create a new graph from file
B.layout() # layout with default (neato)
B.draw('simple.png') # draw png
print("Wrote simple.png")