Classes and utilities for packing/unpacking bytes.

[plum] Pack/Unpack Memory

The plum-py Python 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.

Features include:

• Easy to Create Custom Types
• Visual Memory Summaries
• Arbitrary Nesting
• Companion Performance plum-boost Package

See the Quick Start to learn the basics and the Tutorials for more complete usage examples. The following summarizes the plum types available in this package.

Plum Type	Description
plum.array	list of uniformly typed
plum.bytearray	array of bytes
plum.float	floating point
plum.int	integers
plum.int.bitfields	integer with bit field accessors
plum.int.enum	integer enumerated constants
plum.int.flag	integer with bit flags
plum.items	collection of uniquely typed items
plum.ipv4	IPV4 address
plum.nil	no bytes
plum.str	strings
plum.structure	predefined structure of uniquely typed members