How to use Ternary Contour Plots - 📊 Plotly Python - Plotly

I have datas in a triangle, and I want to use Ternary Contour plot. But I do not know how to do it. The examples do now show the information on the datas. Could somebody explain it more, or give an example? Thank you very much!

Basics of Ternary plots with Python's Plotly, by Thiago Carvalho

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Contour Plots · Issue #5 · marcharper/python-ternary · GitHub