def _get_blob_num_by_hash(self, stream_hash, blob_hash):
        if (stream_hash, blob_hash) in self.stream_blobs:
            return defer.succeed(self.stream_blobs[(stream_hash, blob_hash)]['blob_num'])
dataset/ETHPy150Open lbryio/lbry/lbrynet/lbryfile/LBRYFileMetadataManager.py/TempLBRYFileMetadataManager._get_blob_num_by_hash/original