diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst index 8f427fff76b0ba..9fe14c592bd22d 100644 --- a/Doc/whatsnew/3.14.rst +++ b/Doc/whatsnew/3.14.rst @@ -71,6 +71,7 @@ Summary -- release highlights * :ref:`PEP 761: Discontinuation of PGP signatures ` * :ref:`PEP 765: Disallow return/break/continue that exit a finally block ` * :ref:`PEP 768: Safe external debugger interface for CPython ` +* :ref:`PEP 784: Adding Zstandard to the standard library ` * :ref:`A new type of interpreter ` * :ref:`Syntax highlighting in PyREPL `, and color output in :ref:`unittest `, @@ -232,6 +233,51 @@ See :pep:`768` for more details. (Contributed by Pablo Galindo Salgado, Matt Wozniski, and Ivona Stojanovic in :gh:`131591`.) +.. _whatsnew314-pep784: + +PEP 784: Adding Zstandard to the standard library +------------------------------------------------- + +The new ``compression`` package contains modules :mod:`!compression.lzma`, +:mod:`!compression.bz2`, :mod:`!compression.gzip` and :mod:`!compression.zlib` +which re-export the :mod:`lzma`, :mod:`bz2`, :mod:`gzip` and :mod:`zlib` +modules respectively. The new import names under ``compression`` are the +canonical names for importing these compression modules going forward. However, +the existing modules names have not been deprecated. Any deprecation or removal +of the existing compression modules will occur no sooner than five years after +the release of 3.14. + +The new :mod:`!compression.zstd` module provides compression and decompression +APIs for the Zstandard format via bindings to `Meta's zstd library +`__. Zstandard is a widely adopted, highly +efficient, and fast compression format. In addition to the APIs introduced in +:mod:`!compression.zstd`, support for reading and writing Zstandard compressed +archives has been added to the :mod:`tarfile`, :mod:`zipfile`, and +:mod:`shutil` modules. + +Here's an example of using the new module to compress some data: + +.. code-block:: python + + from compression import zstd + import math + + data = str(math.pi).encode() * 20 + + compressed = zstd.compress(data) + + ratio = len(compressed) / len(data) + print(f"Achieved compression ratio of {ratio}") + +As can be seen, the API is similar to the APIs of the :mod:`!lzma` and +:mod:`!bz2` modules. + +(Contributed by Emma Harper Smith, Adam Turner, Gregory P. Smith, Tomas Roun, +Victor Stinner, and Rogdham in :gh:`132983`) + +.. seealso:: + :pep:`768`. + .. _whatsnew314-remote-pdb: @@ -907,7 +953,7 @@ ast (Contributed by Irit Katriel in :gh:`123958`.) * The ``repr()`` output for AST nodes now includes more information. - (Contributed by Tomas R in :gh:`116022`.) + (Contributed by Tomas Roun in :gh:`116022`.) * :func:`ast.parse`, when called with an AST as input, now always verifies that the root node type is appropriate. pFad - Phonifier reborn

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