Datatable `tooltip_data` argument - request for example

[tbillah]

Thanks for your nice example @Emmanuelle, my problem was row vs column order:

Dash DataTable - Tooltips

Hi @chriddyp, I think the error message is okay. Perhaps I should have mentioned, I also tried with square brackets around learning from the error. However, I tried again with what you provided and ran into the following: [image] By the way, I had to adjust your suggestion by inserting one missing square bracket: tooltip_data = [ {'type': 'text', 'value': [f'{r},{c}' for r in df[df.columns[0]].values]} for c in df.columns ]

I got it working now following your example.