app.py

import requests
import streamlit as st

print('downloading...')
res = requests.get('https://www.dropbox.com/s/4j4z58wuv8o0mfz/models.zip')
with open('tmp.zip', 'wb') as f:
    f.write(res.content)

st.write('<a href="tmp.zip">tmp.zip</a>', unsafe_allow_html=True)