How to add an on_click event to Parameterized dataframe widget?

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There is no need to use pn.Param to turn the only parameter you have into a widget (pn.Param basically creates widgets out of the parameters of a param.Parameterized class and a container to host them).

You can just create the widget manually

    def view(self):
        w_df = pn.widgets.Tabulator.from_param(self.param.options)
        w_df.on_click(self.table_click)

        return w_df

I’m not sure though if having our various options in a DF is the right thing (usually you’d go with a param.Selector()). But it may make sense if your use case is to display all possible options (incl. the parameters) in a a concise tightly packed list.

There are different ways, the post below has a nice summary and some discussion: