Release 0.4.0

Changes from 0.3.2 to 0.4.0

• New pack_array2() and unpack_array2() functions for packing NumPy arrays. Contrarily to pack_array() and unpack_array() counterparts, the new ones allow for compressing arrays larger than 2 GB in size.

• New Scunk.to_cframe() and blosc2.from_cframe() methods for serializing/deserialzing SChunk instances.

• New Schunk.get_slice(), SChunk.__getitem__() and SChunk.__setitem__() methods for getting/setting slices from/to SChunk instances.

• The compcode parameter has been renamed to codec. A NameError exception will be raised when using the old name. Please update your code when you see this exception.

• More doc restructurings. Hopefully, they are more pleasant to read now :-)

Release 0.3.2

Changes from 0.3.1 to 0.3.2

• Several leaks fixed. Thanks to Christoph Gohlke.

• Internal C-Blosc2 updated to 2.3.1

Release 0.3.0

Changes from 0.2.0 to 0.3.0

• Added a new blosc2.open(urlpath, mode) function to be able to open persisted super-chunks.

• Added a new tutorial in notebook format (examples/tutorial-basics.ipynb) about the basics of python-blosc2.

• Internal C-Blosc2 updated to 2.2.0

Release 0.2.0

Release notes

Changes from python-blosc2 0.1.10 to python-blosc2 0.2.0

• Internal C-Blosc updated to 2.0.4.

New super-chunk implementation

• New SChunk class that allows to create super-chunks.
  This includes the capability of storing data in 4
  different ways (sparse/contiguous and in memory/on-disk),
  as well as storing variable length metalayers.

• Also, during the contruction of a SChunk instance,
  an arbitrarily large data buffer can be given so that it is
  automatically split in chunks and those are appended to the
  SChunk.

• See examples/schunk.py and examples/vlmeta.py for some examples.

• Documentation of the new API is here: https://python-blosc2.readthedocs.io

This release is the result of a grant offered by
the Python Software Foundation to Marta Iborra.
A blog entry was written describing the difficulties and relevant
aspects learned during the work:
https://www.blosc.org/posts/python-blosc2-initial-release/

Release 0.1.10

Changes from python-blosc2 0.1.9 to python-blosc2 0.1.10

• Release with C-Blosc 2.0.2 sources and binaries.

Release 0.1.9

Changes from python-blosc2 0.1.8 to python-blosc2 0.1.9

• Release with C-Blosc 2.0.1 sources and binaries.

Release 0.1.7

Changes from python-blosc2 0.1.5 to python-blosc2 0.1.7

• Headers and binaries for the C-Blosc2 library are starting
  to being distributed inside wheels.

• Internal C-Blosc2 submodule updated to 2.0.0-rc2.

• Repeating measurements 4 times in benchs so as to get more
  consistent figures.

Release 0.1.5

Fix some issues with PyPI packaging. Wheels are here!
See: #9

Release 0.1.1

Initial release

python-blosc2 aims to leverage the new C-Blosc2 API so as to support super-chunks, serialization and all the features introduced in C-Blosc2. This is work in process and will be done incrementally in future releases.

Note: python-blosc2 is meant to be backward compatible with python-blosc data. That means that it can read data generated with python-blosc, but the opposite is not true (i.e. there is no forward compatibility).

Changes from python-blosc to python-blosc2

• The functions compress_ptr and decompress_ptr
  are replaced by pack and unpack since
  Pickle protocol 5 comes with out-of-band data.

• The function pack_array is equivalent to pack,
  which accepts any object with attributes itemsize
  and size.

• On the other hand, the function unpack doesn't
  return a numpy array whereas the unpack_array
  builds that array.

• The blosc.NOSHUFFLE is replaced
  by the blosc2.NOFILTER, but for backward
  compatibility blosc2.NOSHUFFLE still exists.

• A bytearray or NumPy object can be passed to
  the blosc2.decompress function to store the
  decompressed data.