

def compute_etag(self):
    'Sets the ``Etag`` header based on static url version.\n\n        This allows efficient ``If-None-Match`` checks against cached\n        versions, and sends the correct ``Etag`` for a partial response\n        (i.e. the same ``Etag`` as the full file).\n\n        .. versionadded:: 3.1\n        '
    version_hash = self._get_cached_version(version_hash.absolute_path)
    if (not version_hash):
        return None
    return ('"%s"' % (version_hash,))

dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py StaticFileHandler.compute_etag/VarMisuse@18/137 `self`->`version_hash`