Pydeck_chart two way communication? how to select data on map?

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Hi all,

I’ve been using streamlit a lot, it’s amazing.
One thing that would be super awesome to have is to have two way communication for pydeck_chart
e.g. in Jupyter notebook:

import pandas as pd
import requests

json = requests.get(DATA_URL).json()
df = pd.DataFrame(json["features"][0]["geometry"]["coordinates"])
df.columns = ['lng', 'lat']

viewport = pdk.data_utils.compute_view(df[['lng', 'lat']])
layer = pdk.Layer(
    'ScreenGridLayer',
    df,
    cell_size_pixels=20,
    color_range=COLOR_RANGE,
    get_position='[lng, lat]',
    pickable=True,
    auto_highlight=True)
r = pdk.Deck(layers=[layer], initial_view_state=viewport)
r.show()

and you can click on the map and get selected data by doing:

pd.DataFrame([r.deck_widget.selected_data])

is there anyway to have something like:

mychart = st.pydeck_chart(r)

then when I click on the map, I can access the data behind call back and get it by doing something like

df = pd.DataFrame([mychart.selected_data])
1 Like
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Hey @SPTKL, welcome to the forums! :tada:

This is not possible today, but we do want to do this, this year. See this bug and the FR for plugins

3 Likes
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Any Update on this ?

4

I was also looking for this bidirectional communication functionality. Is it available now?

1 Like
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Any news?

6

Any?

7

Have you tried out Streamlit Folium? It’s not Pydeck but it does enable bidirectional communication in mapping GitHub - randyzwitch/streamlit-folium: Streamlit Component for rendering Folium maps

1 Like
8

Thanks, I’m going to try it.
At the moment I would like to ask another question, is there a way to get the html code of the streamlit application at a certain point in the application flow?
Again, thanks for the help.

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Any news on this? Very much looking forward to this feature! Will try out folium in the meantime. See this discussion on the same topic: Event Handling of pydeck_chart map in streamlit