def METHOD_NAME(self, s3_file):
    try:
        from boto.utils import fetch_file
        f = fetch_file(s3_file)
        path = os.path.join(self.working_dir, s3_file.split("/")[-1])
        open(path, "w").write(f.read())
    except:
        boto.log.exception('Problem Retrieving file: %s' % s3_file)
        path = None
    return path