Customdata in texttemplate could not be found in heatmap

For a heatmap chart I want to create a hyperlink, which is provided in the customdata. For some reason it looks like the customdata fields is not accessible from the texttemplate field. Executing the sample code below with browser debug mode shows that customdata is not found:

import plotly.graph_objects as go
labels = ["a", "b", "c"]
z = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
customdata = [["http://google.com", "http://google.com", "http://google.com"], ["http://google.com", "http://google.com", "http://google.com"], ["http://google.com", "http://google.com", "http://google.com"]]
fig = go.Figure(data=go.Heatmap(x=labels, y=labels,
                                z=z,
                                customdata=customdata,
                                texttemplate="""<a href="%{customdata}">%{z}</a>""",
                                hovertemplate='%{customdata}<extra></extra>',
                                textfont={"size": 20}))
fig.show()

Commencez par l’exemple de heatmap Python fourni et suivez la manière dont Heatmap customdata est transmis à texttemplate, en le comparant au comportement fonctionnel de hovertemplate. Confirmez le fix en affichant l’hyperlien avec l’URL de customdata et en vérifiant que le texte de hover existant s’affiche toujours correctement.