How to create a column based in other column in st.dataframe?

Using Streamlit
1

Summary

Hi, I have an app that uses a st.dataeditor and I want to create a column with values based in the values of other columns, like streamlit-aggrid virtual columns, when if you change the value in “a” or “b”. the value in the virtual column will change too.

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I tried to use st-aggrid, but i got so many bugs and the project seems stopped.

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Here’s one way to do it with st.data_editor

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Nice. And is possible to achieve that without rerunning the entire app, just the table?

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No, not currently. Theoretically that could be added to the st.dataframe functionality in the future, but otherwise you would need to use a third-party component with some custom javascript to enable that.

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Understood. That functionality is in the plans for future releases?

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Not that I know of, but you’re definitely welcome to suggest it in Issues · streamlit/streamlit · GitHub (if you can’t find an existing issue suggesting it)

You can see the current roadmap here: Issues · streamlit/streamlit · GitHub

7

Just added a issue here:
Create virtual columns in data editor (columns based on other columns) #7057

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