def find_statistics(self, name_or_id, ignore_missing=True):
        return self._find(statistics.Statistics, name_or_id,
                          ignore_missing=ignore_missing)
:param string shard_spec: A string of the form M/N where M, N are ints and 0 <= M < N.
dataset/ETHPy150Open openstack/python-openstacksdk/openstack/telemetry/v2/_proxy.py/Proxy.find_statistics--crossover with--dataset/ETHPy150Open pantsbuild/pants/src/python/pants/base/hash_utils.py/Sharder.InvalidShardSpec.__init__