def download(self):
        """
        Download the archive from the IRS website.
        """
        url = 'http://forms.irs.gov/app/pod/dataDownload/fullData'
        r = requests.get(url, stream=True)
        with open(self.zip_path, 'wb') as f:
            # This is a big file, so we download in chunks
            for chunk in r.iter_content(chunk_size=30720):
                logger.debug('Downloading...')
                f.write(chunk)
                f.flush()
Download the archive from the IRS website.