How to download local folder?

Using Streamlit
4 
 def zipdir(path, ziph):
                 # ziph is zipfile handle
                for root, dirs, files in os.walk(png_path):
                    for file in files:
                        ziph.write(os.path.join(root, file))
            zip_path = 'Python.zip'        
            zipf = zipfile.ZipFile(zip_path, 'w', zipfile.ZIP_DEFLATED)
            zipdir('tmp/', zipf)
            zipf.close()

            with open(zip_path, "rb") as f:
                bytes = f.read()
                b64 = base64.b64encode(bytes).decode()
                href = f'<a href="data:file/csv;base64,{b64}">Download File</a> (right-click and save as &lt;some_name&gt;.csv)'

                st.sidebar.markdown(href, unsafe_allow_html=True)

Hi community!

now I can compress A folder , it work

but the download link not working

thanks for help

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