Converting dot to png in python

Question

I have a dot file generated from my code and want to render it in my output. For this i have seen on the net that the command is something like this on cmd

dot -Tpng InputFile.dot -o OutputFile.png  for Graphviz

But my problem is that I want to use this inbuilt in my python program.

How can i do so ??

I looked at pydot but can't seem to find an answer in there.....

Answer 1

pydot needs the GraphViz binaries to be installed anyway, so if you've already generated your dot file you might as well just invoke dot directly yourself. For example:

from subprocess import check_call
check_call(['dot','-Tpng','InputFile.dot','-o','OutputFile.png'])

Answer 2

Load the file with pydot.graph_from_dot_file to get a pydot.Dot class instance. Then write it to a PNG file with the write_png method.

import pydot

(graph,) = pydot.graph_from_dot_file('somefile.dot')
graph.write_png('somefile.png')

Answer 3

You can use pygraphviz. Once you have a graph loaded, you can do

graph.draw('file.png')

Answer 4

You can try:

import os
os.environ["PATH"] += os.pathsep + 'C:/Program Files (x86)/Graphviz2.38/bin/'
os.system('dot -Tpng random.dot -o random.png')