SChunk.update_data# SChunk.update_data(nchunk, data, copy)# Update the chunk in the nchunk-th position with the given data. Parameters: nchunk¶ (int) – The position identifying the chunk that will be updated. data¶ (bytes object) – The data that will be compressed and will replace the old one. copy¶ (bool) – Whether to internally do a copy of the chunk to update it or not. Returns: out – The number of chunks in the SChunk. Return type: int Raises: RunTimeError – If some problem was detected.