Chord Diagram in Python

Question

Hi have a DataFrame along those lines:

Source   Target    Value     
A        B         10       
A        C         5    
A        D         15
A        E         20
A        F         3
B        A         3
B        G         15
F        D         13
F        E         2
E        A         20
E        D         6

And want to draw this Chord Diagram using Python:

I found this chord diagram in the following link: https://www.data-to-viz.com/graph/chord.html. It states that this plot is made using the circlize library (which I believe is an R library). Is there a way to do this in Python as well?

I would also like to be able to choose the color for each element (A to G in my case) and write on the circumference as shown in the example image.

Here is another DataFrame for example with the colors:

Name   Color
A      Red
B      Orange
C      Yellow
D      Green
E      Blue
F      Purple

Also an arrow tip to help distinguish the source from the target, if possible, as in the example image.

I can't find a ready available library in python that does this for me.

Answer 1

Building on @mportes answer,

• The Chord library now is a paid service, included in plotapi.
• Plotting chord diagrams in plotly seems pretty complicated and the example is only for v3.

So the solution that worked best for me is using Holoviews. Here is an example plot. I don't know if you can make arrows, but the direction from source to target is easily identifiable because the chords always have the source color.