pygraphviz ValueError: Program dot not found in path

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, Sep 04 '13 at 13:19

score 4 · Answer 1 · answered Feb 21 '13 at 23:55

4

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

answered Feb 21 '13 at 23:55

wRAR

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I just done it but nothing happened =( – nonameg Feb 22 '13 at 00:08
1

@nonameg are you sure you are using the updated environment? – wRAR Feb 22 '13 at 00:19
what's the updated environment? – nonameg Feb 22 '13 at 09:40
@nonameg if you only changed the environment variable settings in the system settings, you need to relogin for them to take effect. – wRAR Feb 22 '13 at 11:39
1

@wRAR or open a new command prompt if you're doing it from the command line. – Antimony Jun 02 '13 at 18:56
what should be the updated path variable? – user2543622 Mar 29 '14 at 16:21

pygraphviz ValueError: Program dot not found in path

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