blosc2.schunk.SChunk.update_chunk#
- SChunk.update_chunk(nchunk: int, chunk: bytes) int #
Update an existing chunk in the SChunk.
- Parameters:
- Returns:
out – The number of chunks in the SChunk.
- Return type:
int
- Raises:
RunTimeError – If a problem is detected.
Examples
>>> import blosc2 >>> import numpy as np >>> nchunks = 5 >>> chunk_size = 200 * 1000 * 4 >>> data = np.arange(nchunks * chunk_size // 4, dtype=np.int32) >>> cparams = blosc2.CParams(typesize=4) >>> schunk = blosc2.SChunk(chunksize=chunk_size, data=data, cparams=cparams) >>> f"Initial number of chunks: {schunk.nchunks}" Initial number of chunks: 5 >>> c_index = 1 >>> new_data = np.full(chunk_size // 4, fill_value=c_index, dtype=np.int32).tobytes() >>> compressed_data = blosc2.compress2(new_data, typesize=4) >>> # Update the 2nd chunk (index 1) with new data >>> nchunks = schunk.update_chunk(c_index, compressed_data) >>> f"Number of chunks after update: {nchunks}" Number of chunks after update: 5