How to download a file in Streamlit?

Use the st.download_button widget that is natively built into Streamlit. Check out a sample app demonstrating how you can use st.download_button to download common file formats.

import streamlit as st # Text files text_contents = ''' Foo, Bar 123, 456 789, 000 ''' # Different ways to use the API st.download_button('Download CSV', text_contents, 'text/csv') st.download_button('Download CSV', text_contents) # Defaults to 'text/plain' with open('myfile.csv') as f: st.download_button('Download CSV', f) # Defaults to 'text/plain' # --- # Binary files binary_contents = b'whatever' # Different ways to use the API st.download_button('Download file', binary_contents) # Defaults to 'application/octet-stream' with open('', 'rb') as f: st.download_button('Download Zip', f, file_name='') # Defaults to 'application/octet-stream' # You can also grab the return value of the button, # just like with any other button. if st.download_button(...): st.write('Thanks for downloading!')

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