Graphviz's executables are not found (Python 3.4)

Question

I am running Python3.4 on Windows 7. I am trying to use the Python interface for graphviz. This is a script I intend to run:

from graphviz import Digraph
imp         


        

Answer 1

To solve this problem,when you install graphviz2.38 successfully, then add your PATH variable to system path.Under System Variables you can click on Path and then clicked Edit and added ;C:\Program Files (x86)\Graphviz2.38\bin to the end of the string and saved.After that,restart your pythonIDE like spyper,then it works well.

Don't forget to close Spyder and then restart.

Answer 2

For all those who are facing this issue in windows 10 even after trying the above mentiond steps, this worked for me - For Windows 10 users trying to debug this same error, launch CMD as administrator (important!) and run dot -c and then run dot -v
This fixed the issue for me

Answer 3

The simplest solution which worked for me (Windows 10, Jupyter Notebook) for this problem is to do the following:

1. pip install graphviz
2. restart jupyter
3. Put the following code in notebook and execute:

import sys

sys.path.append('C:/Users/usrname/AppData/Local/Continuum/anaconda3/Library/bin/graphviz/')

Answer 4

I encountered the same problem in Jupyter Notebook. Add this, and you are good to go.

import os

os.environ['PATH'] = os.environ['PATH']+';'+os.environ['CONDA_PREFIX']+r"\Library\bin\graphviz"

Answer 5

I had faced same problem while trying to create decision tree through pydotplus and graphviz. And used the path variable method to resolve this issue.

Below are the exact steps I used:

1. Although I already had graphviz through conda install command , I re-downloaded the latest package from below path. https://graphviz.gitlab.io/_pages/Download/Download_windows.html Downloaded : graphviz-2.38.zip (Stable Release)

2. Copied the extracted folder under following path on C: Drive. C:\Program Files (x86)\

3. Modified the system path variable and added following path to it. Path Variable : Control Panel > System and Security > System > Advance system Setting > Environment Variable > Path C:\Program Files (x86)\graphviz-2.38\release\bin;

4. After adding above path to environment variable , restarted the system.

5. It worked fine , and I was able to create Decision tree into png.

   enter image description here

Answer 6

I also had this problem on Ubuntu 16.04.

Fixed by running sudo apt-get install graphviz in addition to the pip install I had already performed.