Persistence can change failure into extraordinary achievement
Understanding pygraphviz
The pygraphviz library is used to obtain the graph layout. Pygraphviz is partly integrated into networkx and uses AGraph for graph representation.The resulting image of the graph can be exported in the notebook using the IMAGE class to encapsulate it.
While directly importing pygraphviz in Jupyter Notebook we may encounter the below Errors :
No Module named pygraphviz
import pygraphviz returns an error “ requires pygraphviz http://pygraphviz.github.io/
Command Error out with exit status 1(Failed building wheel for pygraphviz /
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve)
Let’s follow the below guidelines for pygraphviz installation :
Prerequisite to Pygraphviz is graphviz
STEP I : DOWNLOAD AND INSTALL GRAPHVIZ IN WINDOWS
- Download Graphviz via https://graphviz.org/download/
Windows
Stable Windows install packages:
2.47.0 EXE installer for Windows 10 (64-bit):
stable_windows_10_cmake_Release_x64_graphviz-install-2.47.0-win64.exe
- Install Graphviz
Open the downloaded Graphviz setup
Accept the License
Select Install option as below
Take a note of the INSTALL LOCATION
INSTALL Location is used while
- setting up the Path in environment variable in System in Windows
- Installing Pygraphviz in Anaconda Prompt
Select Graphviz and click on INSTALL
STEP II : SETUP ENVIRONMENT VARIABLES FOR GRAPHVIZ
Once the installation is complete
Navigate to “This PC” icon — Right click and select Properties — Advanced System Settings
And select “Environment Variables” — Path — Edit
Click on ADD button to ADD the INSTALL LOCATION of GRAPHVIZ
STEP III : INSTALL PYGRAPHVIZ IN ANACONDA PROMPT
Go to ANACONDA PROMPT and run the command to install PYGRAPHVIZ
python -m pip install — global-option=build_ext — global-option=”IC:\path to Graphviz include files” — global-option=”LC:\path to Graphviz library files” pygraphviz
#path to Graphviz include and library is INSTALL LOCATION set in Step I
Restart the Anaconda Navigator/Jupyter Lab or restart the system to let the configuration changes take place
STEP IV : IMPORT GRAPHVIZ AND PYGRAPHVIZ IN JUPYTER NOTEBOOK
Import graphviz and pygraphviz in Jupyter Notebook/Jupyter Lab using below code
