Low level API

This API is meant to be compatible with the existing python-blosc API. There could be some parameters that are called differently, but other than that, they are largely compatible. In addition, there are some new functions that are not present in the original python-blosc API that are mainly meant to overcome the 2 GB limit that the original API had.

Compress and decompress

compress	Compress the given source data with specified parameters.
compress2	Compress the given src buffer with the specified compression parameters.
decompress	Decompresses a bytes-like compressed object.
decompress2	Decompress the given src buffer with the specified decompression params.
pack	Pack (compress) a Python object.
pack_array	Pack (compress) a NumPy array.
pack_array2	Pack (compress) a NumPy array.
pack_tensor	Pack (compress) a TensorFlow or PyTorch tensor or a NumPy array.
unpack	Unpack (decompress) an object.
unpack_array	Restore a packed NumPy array.
unpack_array2	Unpack (decompress) a packed NumPy array from a cframe.
unpack_tensor	Unpack (decompress) a packed TensorFlow or PyTorch tensor or a NumPy array from a cframe.

Set / get compression params

clib_info	Return information about the compression libraries in the C library.
compressor_list	Returns a list of compressors (codecs) available in the C library.
detect_number_of_cores	Detect the number of cores in this system.
free_resources	Free any temporary memory and thread resources.
get_clib	Return the name of the compression library for Blosc bytesobj buffer.
nthreads	Number of threads to be used in compression/decompression.
print_versions	Print all the versions of software that python-blosc2 relies on.
register_codec	Register a user defined codec.
register_filter	Register a user-defined filter.
set_blocksize	Force the use of a specific blocksize.
set_nthreads	Set the number of threads to be used during Blosc operations.
set_releasegil	Set whether to release the Python global inter-lock (GIL) during c-blosc compress and decompress operations or not.
set_compressor	Set the compressor to be used.
get_compressor	Get the current compressor used for compression.
get_blocksize	Get the internal blocksize to be used during compression.
get_cbuffer_sizes	Get the sizes of a compressed src buffer.
cparams_dflts
dparams_dflts
storage_dflts

Enumerated classes

Codec	Available codecs.
Filter	Available filters.
SpecialValue	Possible special values in a chunk.
SplitMode	Available split modes.
Tuner	Available tuners.

Utils

compute_chunks_blocks(shape[, chunks, ...])	Compute educated guesses for chunks and blocks of a NDArray.
get_slice_nchunks(schunk, key)	Get the unidimensional chunk indexes needed to obtain a slice of a SChunk or a NDArray.
remove_urlpath(path)	Permanently remove the file or the directory specified by path.

Utility variables

blosclib_version	The blosc2 version + date.
DEFINED_CODECS_STOP	Maximum possible Blosc2-defined codec id.
GLOBAL_REGISTERED_CODECS_STOP	Maximum possible Blosc2 global registered codec id.
USER_REGISTERED_CODECS_STOP	Maximum possible Blosc2 user registered codec id.
EXTENDED_HEADER_LENGTH	Blosc2 extended header length in bytes.
MAX_BUFFERSIZE	Maximum buffer size in bytes for a Blosc2 chunk.
MAX_OVERHEAD	Maximum overhead during compression (in bytes).
MAX_TYPESIZE	Blosc2 maximum type size (in bytes).
MIN_HEADER_LENGTH	Blosc2 minimum header length (in bytes).
prefilter_funcs	Registry for prefilter functions.
postfilter_funcs	Registry for postfilter functions.
ucodecs_registry	Registry for user-defined codecs.
ufilters_registry	Registry for user-defined filters.
VERSION_DATE	The C-Blosc2 version's date.
VERSION_STRING	The C-Blosc2 version's string.
__version__	Python-Blosc2 version.