How to share custom files through my Streamlit app?

🎈 Using Streamlit
1

Hello guys,

my goals is to share custom files through my Streamlit app such as jupyter notebook file (.ipynb) or GeoJson (.geojson).

I know Streamlit provide a download button which I can use to share file. Let’s me share with you an example:

import streamlit as st
import nbformat as nbf

# build my notebook 
notebook = nbf.v4.new_notebook()

# enriched my notebook
notebook["cells"] = [nbf.v4.new_markdown_cell("Blablabla"), ...]

# create my download button
st.download_button("Download the notebook", notebook, mime="application/vnd.jupyter")

This is not working !
I am not sure if I made a mistake in my choice for the parameters “mime” or I need to format the notebook to an other format

You can overpass the problem by formating the notebook in an html file :

html_exporter = HTMLExporter()
html_data, _ = html_exporter.from_notebook_node(notebook)

st.download_button("Download the notebook", notebook, mime="text/html")

But I feel more confortable with a notebook file !

Any idea guys ? (:

2

Hi @axelearning, welcome to the Streamlit community!

I would try application/octet-stream as the mime-type, which is the generic type for any sort of bytes.

Best,
Randy

3

Hi @randyzwitch thanks for your fast answer :zap:

I try to do it :

nbf.write(notebook, "notebook.ipynb")
with open("notebook.ipynb", "rb") as nb_file:
            st.download_button("Jupyter notebook", nb_file, mime="application/octet-stream")

But the output of the downloaded file is weird I can’t open it :frowning:

I find a way to do it using a zipfile but this would be wonderfull without it :stuck_out_tongue:

nbf.write(notebook, "notebook.ipynb")

# create a ZipFile object
zipObj = ZipFile("sites_validation.zip", "w")
zipObj.write("notebook.ipynb")
zipObj.close()

with open("sites_validation.zip", "rb") as zipfile:
     st.download_button("Jupyter notebook", zipfile, mime="application/zip")```
4

It sounds like you’re on the right track, changing the mime type. If it doesn’t work as an octet-stream, I’d try application/json, as notebooks are fundamentally a JSON document.

Good luck!

Best,
Randy

5

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