How to download a Pandas DataFrame as a CSV?

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.

Example usage

import streamlit as st
import pandas as pd

df = pd.read_csv("dir/file.csv")

@st.experimental_memo
def convert_df(df):
   return df.to_csv(index=False).encode('utf-8')


csv = convert_df(df)

st.download_button(
   "Press to Download",
   csv,
   "file.csv",
   "text/csv",
   key='download-csv'
)

Additional resources:

• https://blog.streamlit.io/0-88-0-release-notes/
• https://streamlit-release-demos-0-88streamlit-app-0-88-v8ram3.streamlit.app/
• https://docs.streamlit.io/develop/api-reference/widgets/st.download_button