pygraphviz ValueError: Program dot not found in path [duplicate]

Question

the problem is: I am on Windows7 and I've installed pygraphviz library and Graphviz application(Graphviz application is in "C:\Program Files"). When I run my program on python I have the following message:

g.draw(filename,prog='dot')
  File "C:\Python27\lib\site-packages\pygraphviz\agraph.py", line 1418, in draw
    data=self._run_prog(prog,args)
  File "C:\Python27\lib\site-packages\pygraphviz\agraph.py", line 1248, in _run_prog
    runprog=self._get_prog(prog)
  File "C:\Python27\lib\site-packages\pygraphviz\agraph.py", line 1236, in _get_prog
    raise ValueError("Program %s not found in path."%prog) 
ValueError: Program dot not found in path.

How can I solve this problem?

@George Stocker, I do not think this is a "real" duplicate because the other post only deals with Unix systems. On Windows, it is a whole different story. — Shailen
– Shailen, Commented Sep 4, 2013 at 13:19

wRAR · Accepted Answer · 2013-02-21 23:55:57Z

5

You need to add the directory with graphviz binaries to PATH.

answered Feb 21, 2013 at 23:55

wRAR

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6 Comments

nonameg Over a year ago

I just done it but nothing happened =(

wRAR Over a year ago

@nonameg are you sure you are using the updated environment?

nonameg Over a year ago

what's the updated environment?

wRAR Over a year ago

@nonameg if you only changed the environment variable settings in the system settings, you need to relogin for them to take effect.

Antimony Over a year ago

@wRAR or open a new command prompt if you're doing it from the command line.

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