Plotly Express strange hover_data ValueError

Scatter plotting with no problems, until I attempted to map a column of my data to hover_data. Here’s what my data looks like. I’m trying to map the most_similar_kt column to hover_data.

Here’s the error message: ValueError: Element of value of 'hover_data' is not the name of a column in 'data_frame'. Expected one of ['x', 'y', 'label', 'freq', 'similarity', 'size', 'class', 'most_similar_kt'] but received: m

And here’s my code: fig = px.scatter(df, x='x',y='y', color='similarity', size='size', symbol='class',hover_name='label', hover_data='most_similar_kt', width=1500, height=1000, template='plotly_dark', render_mode='webgl')

Apologies if this has already been addressed; I spent 10 minutes googling for errors and it doesn’t appear anyone else had this issue.

If I remove the hover_data assignment, then the plot works:

Thanks for your assistance!

[suciokhan]

Apologies; I figure out that you are supposed to feed columns inside a list rather than just a string of the column name like the other items. Closing out.

[emmanuelle]

@zhaomh1998 we have an open issue #2177 to improve the error message, it should be improved soon 😃.