face-gan-UI.py

# Draw UI elements.
weights_warning = st.warning("Downloading %s..." % file_path)
progress_bar = st.progress(0)

with open(file_path, "wb") as output_file:
    with urllib.request.urlopen(...) as response:

        ...

        while True:

            ...  # Save downloaded bytes to file here.

            # Update UI elements.
            weights_warning.warning(
                "Downloading %s... (%6.2f/%6.2f MB)" %
                (file_path, downloaded_size))
            progress_bar.progress(downloaded_ratio)

...

# Clear UI elements when done.
weights_warning.empty()
progress_bar.empty()