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[plum-py 0.3.0] Pack/Unpack Memory

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  [plum-py 0.3.0] Pack/Unpack Memory Dan Gass <dan.gass@gmail.com> - 2020-03-31 19:47 -0500

#3358 — [plum-py 0.3.0] Pack/Unpack Memory

I am please to announce the availability of beta release 0.3.0 of the
"plum-py" package.

This package provides classes and utility functions to efficiently pack and
unpack bytes similar to what the standard library `struct` module offers.
This package expands significantly on that capability with much more
powerful and convenient access and control of bytes within a buffer
(including handling variable size/type relationships within the buffer
data).

The package provides a large number of fundamental types (e.g.
numbers, structures, arrays, etc.) for specifying buffer data structure.
Each type conforms to a "plug-and-play" architecture facilitating the
ability to be combined in any way, including deeply nested structures of
arbitrary type. You may also write your own custom types that conform to
the "plug-and-play" architecture API and use them in combination with any
of the fundamental types provided.

Docs: https://plum-py.readthedocs.io/en/latest/index.html
PyPi: https://pypi.org/project/plum-py/
Repo: https://gitlab.com/dangass/plum

License: MIT

With Regards,
Dan Gass
(dan.gass at gmail)

Change List
=========

   - Add ``plum.items`` module for collections of typed items for data
   packing applications where the item structure is not predefined.
   - Add support to ``ByteArray`` to restrict instances to a specific size
   during unpacking (add ``nbytes`` parameter to ``__unpack__``).
   - Change ``plum.structure.Structure`` behaviors as follows:
      - Remove support for accepting typed items (use ``plum.items``
      instead).
      - Block subclasses from redefining members when inheriting from a
      class with members already defined.
      - Generate ``__init__`` method only when not overridden (previously
      it generated ``__init__`` only if an override was not present in the new
      structure class, now it also checks the base classes).
      - Facilitate subclassing structure base class without defining
      members as well as subclassing a structure that has defined members.
      - Eliminate restrictions on mutating structures (e.g. ``append()``,
      ``extend()``, etc.)
   - Simplifications:
      - Remove ``cls`` argument in ``getbytes()`` function (backward
      incompatible change).
      - Eliminate need to set ``dump.cls`` in ``__pack__`` and
      ``__unpack__`` methods (it is now the responsibility of those calling
      ``add_record()`` dump method).

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