Hi @Hugo_Lavezac, welcome to the Streamlit community!
By default, plotly charts within Streamlit don’t return information back to Python, as this isn’t part of the base plotly library. @andfanilo wrote an example using Plotly towards make a bi-directional Streamlit component to do this, which you can read here:
I think it would be an awesome contribution to the community if someone undertook writing a full set of bidirectional communications between Streamlit and Plotly!
Best,
Randy
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