if mail.get_content_maintype() == 'multipart':

        for part in mail.walk():
            if part.get_content_maintype() == 'multipart':
                continue

            if part.get('Content-Disposition') is None:

            attachment = part.get_payload(decode=True)

attachment = part.get_payload(decode=True)
gd_file = self.gd_box.g_drive.CreateFile({'title': 'Hello.jpg',
                                                          "parents": [{"kind": "drive#fileLink", "id": folder['id']}]})
                gd_file.GetContentFile(attachment)
                gd_file.Upload()