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Metadata-Version: 1.1
Name: construct
Version: 2.8.16
Summary: A powerful declarative parser/builder for binary data
Home-page: http://construct.readthedocs.org
Author: Arkadiusz Bulski, Tomer Filiba, Corbin Simpson
Author-email: arek.bulski@gmail.com, tomerfiliba@gmail.com, MostAwesomeDude@gmail.com
License: MIT
Description: Construct 2.8
        =============
        
        Construct is a powerful **declarative** parser (and builder) for binary data.
        
        Instead of writing *imperative code* to parse a piece of data, you declaratively define a *data structure* that describes your data. As this data structure is not code, you can use it in one direction to *parse* data into Pythonic objects, and in the other direction, to *build* objects into binary data.
        
        The library provides both simple, atomic constructs (such as integers of various sizes), as well as composite ones which allow you form hierarchical and sequential structures of increasing complexity. Construct features **bit and byte granularity**, easy debugging and testing, an **easy-to-extend subclass system**, and lots of primitive constructs to make your work easier:
        
        * Fields: raw bytes or numerical types
        * Structs and Sequences: combine simpler constructs into more complex ones
        * Bitwise: splitting bytes into bit-grained fields
        * Adapters: change how data is represented
        * Arrays/Ranges: duplicate constructs
        * Meta-constructs: use the context (history) to compute the size of data
        * If/Switch: branch the computational path based on the context
        * On-demand (lazy) parsing: read and parse only what you require
        * Pointers: jump from here to there in the data stream
        
        
        Example
        ---------
        
        A ``Struct`` is a collection of ordered, named fields::
        
            >>> format = Struct(
            ...     "signature" / Const(b"BMP"),
            ...     "width" / Int8ub,
            ...     "height" / Int8ub,
            ...     "pixels" / Array(this.width * this.height, Byte),
            ... )
            >>> format.build(dict(width=3,height=2,pixels=[7,8,9,11,12,13]))
            b'BMP\x03\x02\x07\x08\t\x0b\x0c\r'
            >>> format.parse(b'BMP\x03\x02\x07\x08\t\x0b\x0c\r')
            Container(signature=b'BMP')(width=3)(height=2)(pixels=[7, 8, 9, 11, 12, 13])
        
        A ``Sequence`` is a collection of ordered fields, and differs from a ``Range`` in that latter is homogenous::
        
            >>> format = PascalString(Byte, encoding="utf8") >> GreedyRange(Byte)
            >>> format.build([u"lalaland", [255,1,2]])
            b'\nlalaland\xff\x01\x02'
            >>> format.parse(b"\x004361789432197")
            ['', [52, 51, 54, 49, 55, 56, 57, 52, 51, 50, 49, 57, 55]]
        
        See more examples of `file formats <https://github.com/construct/construct/tree/master/construct/examples/formats>`_ and `network protocols <https://github.com/construct/construct/tree/master/construct/examples/protocols>`_ in the repository.
        
        
        Sticky
        --------
        Version 2.5.5 is legacy. If you are maintaining a project that depended on this library for a long time, you should probably use this version. This branch is not actively maintained, not even bugfixes.
        
        Version 2.8 was released on September, 2016. There are significant API and implementation changes. Fields are now name-less and operators / >> [] are used to create Structs Sequences and Ranges. Most classes changed interface and behavior. You should read entire documentation again.
        
        
        Development and support
        -------------------------
        Please use the `github issues <https://github.com/construct/construct/issues>`_ to ask general questions, make feature requests, report issues and bugs, and to send in patches. Good quality extensions to test suite are highly welcomed. There is also a `mailing list <https://groups.google.com/d/forum/construct3>`_ that was used for years but github issues should be preffered.
        
        Main documentation is at `construct.readthedocs.org <http://construct.readthedocs.org>`_, where you can find all kinds of examples. Source is on  `github <https://github.com/construct/construct>`_. Releases are available on `pypi <https://pypi.python.org/pypi/construct>`_.
        
        `Construct3 <http://tomerfiliba.com/blog/Survey-of-Construct3/>`_ is a different project. It is a rewrite from scratch and belongs to another (previous) developer, it diverged from this project years ago. As far as I can tell, it was never released and abandoned.
        
        
        Requirements
        --------------
        Construct should run on any Python 2.7 3.3 3.4 3.5 3.6 and pypy pypy3 implementation.
        
        Best should be 3.6 because it supports ordered keyword arguments which comes handy when declaring Struct members or crafting Containers.
        
Keywords: construct,declarative,data structure,binary,parser,builder,pack,unpack
Platform: POSIX
Platform: Windows
Classifier: Development Status :: 5 - Production/Stable
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: Implementation :: PyPy
Provides: construct