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Download a file

This recipe downloads a file from a Unity Catalog volume using the Databricks SDK for Python.

Code snippet​

app.py
import os
import streamlit as st
from databricks.sdk import WorkspaceClient

w = WorkspaceClient()

download_file_path = st.text_input(
    label="Path to file", placeholder="/Volumes/catalog/schema/volume_name/file.csv"
)

response = w.files.download(download_file_path)
file_data = response.contents.read()
file_name = os.path.basename(download_file_path)

st.download_button(label="Download", data=file_data, file_name=file_name)

Resources​

Permissions​

Your app service principal needs the following permissions:

  • USE CATALOG on the volume's catalog
  • USE SCHEMA on the volume's schema
  • READ VOLUME on the volume

See Privileges required for volume operations for more information.

Dependencies​

requirements.txt
databricks-sdk
streamlit