How to create and file_send() in-memory zipfiles in Flask

send_inmemory_zipfile_flask.py

memory_file = BytesIO()
with zipfile.ZipFile(memory_file, 'w') as zf:
    files = result['files']
    for individualFile in files:
        data = zipfile.ZipInfo(individualFile['fileName'])
        data.date_time = time.localtime(time.time())[:6]
        data.compress_type = zipfile.ZIP_DEFLATED
        zf.writestr(data, individualFile['fileData'])
memory_file.seek(0)
return send_file(memory_file, attachment_filename='capsule.zip', as_attachment=True)