nx_pydot
========

>>> from networkx import *
>>> from networkx.drawing import *
>>> from networkx.drawing.nx_pygraphviz import *

>>> import os,sys

Undirected
----------

>>> H=Graph()
>>> H.add_edge('A','B')
>>> H.add_edge('A','C')
>>> H.add_edge('B','C')
>>> H.add_edge('A','D')
>>> H.add_node('E')


>>> P=pygraphviz_from_networkx(H)
>>> N=networkx_from_pygraphviz(P)
>>> sorted(N.nodes())==sorted(H.nodes())
True
>>> sorted(N.edges())==sorted(H.edges())
True


>>> P=to_pygraphviz(H)
>>> N=from_pygraphviz(P)
>>> sorted(N.nodes())==sorted(H.nodes())
True
>>> sorted(N.edges())==sorted(H.edges())
True

read write
----------

with file name
----------------

>>> import tempfile
>>> fname=tempfile.mktemp()
>>> write_dot(N,fname)
>>> Hin=read_dot(fname)
>>> os.unlink(fname)
>>> sorted(Hin.nodes())==sorted(H.nodes())
True
>>> sorted(Hin.edges())==sorted(H.edges())
True

with file handle
----------------

>>> (fd,fname)=tempfile.mkstemp()
>>> fh=open(fname,'w')
>>> write_dot(N,fh)
>>> fh.close()
>>> fh=open(fname,'r')
>>> Hin=read_dot(fh)
>>> sorted(Hin.nodes())==sorted(H.nodes())
True
>>> sorted(Hin.edges())==sorted(H.edges())
True
>>> fh.close()
>>> os.unlink(fname)


Directed
----------

>>> H=DiGraph()
>>> H.add_edge('A','B')
>>> H.add_edge('A','C')
>>> H.add_edge('B','C')
>>> H.add_edge('A','D')
>>> H.add_node('E')


>>> P=pygraphviz_from_networkx(H)
>>> N=networkx_from_pygraphviz(P)
>>> sorted(N.nodes())==sorted(H.nodes())
True
>>> sorted(N.edges())==sorted(H.edges())
True

>>> import tempfile
>>> fname=tempfile.mktemp()
>>> write_dot(N,fname)


>>> Hin=read_dot(fname)
>>> os.unlink(fname)
>>> sorted(Hin.nodes())==sorted(H.nodes())
True
>>> sorted(Hin.edges())==sorted(H.edges())
True

Layout
------

>>> pos=graphviz_layout(H,prog="circo",args="-Gepsilon=0.1",root='A')

Attributes
----------


Undirected
----------

>>> H=Graph()
>>> H.add_edge('A','B')
>>> H.add_edge('A','C')
>>> H.add_edge('B','C')
>>> H.add_edge('A','D')
>>> H.add_node('E')

>>> H.attr={}
>>> H.nattr={'A':{},'B':{},'C':{},'D':{},'E':{}}
>>> eattr={('A','B'):{},('A','C'):{},('B','C'):{},('A','E'):{}}
>>> H.nattr['A']['color']='red'
>>> eattr[('A','B')]['color']='blue'
>>> H.attr.update(label='colors')

>>> P=to_pygraphviz(H,H.attr,H.nattr,eattr)
>>> fh=open('foo.dot','w')
>>> P.write(fh)

fh=sys.stdout