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 import pydotplus  dot   Digraph comment  The Round Table    dot node  A    King Arthur   dot node  B    Sir Bedevere the Wise   dot node  L    Sir Lancelot the Brave   dot edges   AB    AL    dot edge  B    L   constraint  false    print dot source  dot render  test-output round-table gv   view True    I get the following error at runtime    RuntimeError  failed to execute   dot    -Tpdf    -O    test-output round-table gv    make sure the Graphviz executables are on your systems  path   Now I am sure I have properly installed the correct dependencies  I first tried to set the correct environment variables  The graphviz executables are located at C  Program Files  x86  Graphviz2 37 bin so I went to the Environment Variables section  There are two sections there  User Variables and System Variables  Under System Variables I clicked on Path and then clicked Edit and added  C  Program Files  x86  Graphviz2 37 bin to the end of the string and saved  This didn t clear the error   Then  following the answer given here I uninstalled pydot  actually I use pydotplus here  and re-installed it again  but still no success    I have been trying for hours to fix this and the whole PATH variable thing is just confusing and frustrating

User · Answer

Please use pydotplus instead of pydot

Find:C:\Users\zhangqianyuan\AppData\Local\Programs\Python\Python36\Lib\site-packages\pydotplus
Open graphviz.py
Find line 1925 - line 1972, find the function:
```
def create(self, prog=None, format='ps'):
```

In the function find:

if prog not in self.progs:
    raise InvocationException(
        'GraphViz\'s executable "%s" not found' % prog)

if not os.path.exists(self.progs[prog]) or \
        not os.path.isfile(self.progs[prog]):
    raise InvocationException(
        'GraphViz\'s executable "{}" is not'
        ' a file or doesn\'t exist'.format(self.progs[prog])
    )

Between the two blocks add this(Your Graphviz's executable path):

  self.progs[prog] = "C:/Program Files (x86)/Graphviz2.38/bin/gvedit.exe"`

After adding the result is:

if prog not in self.progs:
    raise InvocationException(
        'GraphViz\'s executable "%s" not found' % prog)

self.progs[prog] = "C:/Program Files (x86)/Graphviz2.38/bin/gvedit.exe"

if not os.path.exists(self.progs[prog]) or \
        not os.path.isfile(self.progs[prog]):
    raise InvocationException(
        'GraphViz\'s executable "{}" is not'
        ' a file or doesn\'t exist'.format(self.progs[prog])
    )

save the changed file then you can run it successfully.
you'd better save it as bmp file because png file will not work.

User · Answer

I am not sure if this is an answer to THIS question  but this also seems to be the  how do I get graphviz to run on my setup   thread  I also did not see python-graphviz mentioned anywhere   As such  Ubuntu 16 04  conda Python 3 7  using Jupyter notebooks   conda install -c anaconda graphviz conda install -c conda-forge python-graphviz   The images would not render after trying only the first command  they did render after running the second   I also installed pydot-plus  but did not see any change in behavior  performance  or image resolution

User · Answer

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

User · Answer

Just install   conda install graphviz   then install  conda install -c conda-forge pydotplus

User · Answer

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 quot  Library bin graphviz quot

User · Answer

Please note that I am using windows 10  some of the following may or may not applicable for other versions of windows or operating systems      Note 2        the Graphviz bin file address on your system  can be C  Program Files  x86  Graphviz2 38 bin or any other path you installed Graphviz there  We have problem not only with Graphviz but also with other external EXE files we want to use in Jupyter  The reason is when jupyter wants to import a package it looks in working directory to find it and when it fails to find the package it returns such errors  What we can do is tackle this is as follows  1  check if the Graphviz is installed on your system and if not you can download and install it from   https   graphviz gitlab io  pages Download Download windows html  and then install it  When you installing Graphviz  keep in mind where  in which folder  you are installing it  If you see the above error when you use   import graphviz   then you have several options   2  you can call the  exe file in the ipynb via   import os os environ  PATH      os pathsep   r the Graphviz bin file address on your system    It is my experience that it is only works for the same ipynb that I am working with and every time that I open the notebook I need to call this lines of code   3  If you want the Jupyter where to find the exe file  you need to set environmenal path  In windows 10 you can do this going to  Control Panel   System and Security   System   Advanced System Settings   Environment Variables   Path   Edit   New   and then add the  the Graphviz bin file address on your system  In windows 8 or lower go to   Control Panel   System and Security   System   Advanced System Settings   Environment Variables  and then add the   semicolon     the Graphviz bin file address on your system  to the end of path string Note  remember to restart your machine   4  and even this does not work  define a variable going to  Control Panel   System and Security   System   Advanced System Settings   Environment Variables and then     Then define a variable as this    Remember to name the variable Graphviz  At last restart your PC and hope it works

User · Answer

I tried setting up Environment variable  Didn t work I am in Windows environment Combining above methods worked for me     Downloaded graphviz-2 38 zip from https   graphviz gitlab io  pages Download Download windows html Copied the extracted folder into C  Users  AppData Local Continuum anaconda3 pkgs Graphviz2 38 I called the Graphviz location in my code  Build the classifier  import sklearn datasets as datasets import pandas as pd from sklearn tree import DecisionTreeClassifier iris datasets load iris   df pd DataFrame iris data  columns iris feature names  y iris target  dtree DecisionTreeClassifier   dtree fit df y    Build the tree  from sklearn externals six import StringIO   from IPython display import Image   from sklearn tree import export graphviz import pydotplus import graphviz import os os environ   PATH       os pathsep    C  Users tstusr AppData Local Continuum anaconda3 pkgs Graphviz2 38 bin   dot data   StringIO   export graphviz dtree  out file dot data                    filled True  rounded True                  special characters True  graph   pydotplus graph from dot data dot data getvalue      Image graph create png      Here is how the tree looks

User · Answer

I had the same issue on Ubuntu 14 04  with Jupyter   To solve it I ve added the dot library to python sys path  First  check if dot is installed   Then  find his path whereis dot -   local notebook miniconda2 envs ik2 bin dot  Finally in python script   sys path append   local notebook miniconda2 envs ik2 bin dot

User · Answer

If you are on Win10  install Graphviz and then use following command to add the path   import os os environ  PATH      os pathsep    C  Program Files  x86  Graphviz2 38 bin

User · Answer

The simplest solution which worked for me  Windows 10  Jupyter Notebook  for this problem is to do the following   pip install graphviz restart jupyter Put the following code in notebook and execute    import sys  sys path append  C  Users usrname AppData Local Continuum anaconda3 Library bin graphviz

User · Answer

when you add C  Program Files  x86  Graphviz2 38 bin to PATH  then you must close your IDE enviroment such as spyder and restart  you ll solve the  RuntimeError make sure the Graphviz executables are on your systems  path

User · Answer

I had the same issue with Windows 10   First  I installed graphviz-2 38 0 with the following command without any problem     install -c anaconda graphviz 2 38 0   Second  I installed pydotplus with the following command without any problem     install -c conda-forge pydotplus   After that  when I got to my step to visualize my decision tree had the following issue with  InvocationException  GraphViz s executables not found      C  Users admin Anaconda3 lib site-packages pydotplus graphviz py in create self  prog  format     1958             if self progs is None     1959                 raise InvocationException  - gt  1960                      GraphViz  s executables not found      1961     1962         if prog not in self progs   InvocationException  GraphViz s executables not found   In my case  all I had to do to fix it is to put the environment path of the graphviz executables in my user PATH environment variable and this fixed it   Just make sure it is the path where YOUR exe files are located     C  Users admin Anaconda3 pkgs graphviz-2 38 0-4 Library bin graphviz

User · Answer

I solved it installing directly from https   graphviz gitlab io  pages Download Download windows html and including in windows path   C  Program Files  x86  Graphviz2 38 bin  C  Program Files  x86  Graphviz2 38   After I restart windows

User · Answer

Try import os  os environ  PATH   os environ  PATH       os environ  CONDA PREFIX   r quot  Library bin graphviz quot

User · Answer

For windows 8 1  amp  python 2 7   I fixed the problem by following below steps  1   Download and install graphviz-2 38 msi http   www graphviz org pub graphviz stable windows graphviz-2 38 msi  2   Set the path variable   Control Panel   System and Security   System   Advanced System Settings   Environment Variables   Path   Edit add  C  Program Files  x86  Graphviz2 38 bin

User · Answer

Tried many ways and here is what really solved the problem - it worked for both windows 8 1 10  amp  python 3      1    pip install graphviz   2   the key action needed is to set the path variable by following steps below    a  Control Panel   System and Security   System   Advanced System Settings   Environment Variables   Path   Edit b  add  C  Program Files  x86  Graphviz2 38 bin

User · Answer

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

User · Answer

I was stuck for a very long time at this problem but after sometime I found a solution   pip install graphviz conda install graphviz Now again  install graphviz from   gt  https   graphviz org  pages Download Download windows html  The msi file  After setup is complete set path   gt  C  Program Files  x86  Graphviz2 38 bin

User · Answer

In my case  Win10  Anaconda3  Jupyter notebook  after  conda install graphviz  I have to add to the PATH  C  Users username Anaconda3 Library bin graphviz  To modify PATH goto Control Panel  gt  System and Security  gt  System  gt  Advanced System Settings  gt  Environment Variables  gt  Path  gt  Edit  gt  New

User · Answer

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

User · Answer

This is the fresh solution I ve used    I got the same problem  I m using Anaconda and Jupyter Notebook  What I did to solve this problem is NOT to install Graphiz zip from the intenet  I just did these steps   Create a new environment using  gt  gt conda create -n  env name  install graphviz lib inside this new env   gt  gt  conda install graphviz I wrote this lines in the notebook cell and run it import os os environ  PATH     os environ  PATH       os environ  CONDA PREFIX   r quot  Library bin graphviz quot   Finally  The image is appeared  I made a small party for this because it took 3 days from me

User · Answer

On jupyter ipython  notebook with anaconda in win10 I solved the problem by conda install graphviz after I had installed graphviz by pip install graphviz

User · Answer

Because Mac OS has not been mentioned I will add that I had the same problem on OS X Yosemite  the solution I found was to do brew install graphviz  This solved the problem  not sure if I shouldn t have just edited one of the other answers in this list  because they all seem to be the same answer  just install an official package in addition to the Python Library

User · Answer

I m using Windows 10  Python 3 6 on Anaconda 3 and have faced the same issue   I ve had it work by doing the following in sequence    From Anaconda Terminal  pip install pydotplus From Anaconda Terminal  conda install pydotplus From Anaconda Terminal  pip install graphviz From Anaconda Terminal  conda install graphviz Went to Windows Environment Varialbes  PATH  and added the location of my dot exe file under graphviz directory in Anaconda    worked fine after that

User · Answer

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    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  Copied the extracted folder under following path on C  Drive  C  Program Files  x86   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  After adding above path to environment variable   restarted the system  It worked fine   and I was able to create Decision tree into png    enter image description here

User · Answer

As it appears  Graphviz2 37 is known to have problems with the PATH variable on windows  I uninstalled it  removed the environment variables associated with it and instead downloaded and installed the newer beta version 2 39 and it now works like a charm

[python] Graphviz's executables are not found (Python 3.4)

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