Skip to main content
Help us improve PyPI by participating in user testing. All experience levels needed!

Domain Specific Language(DSL) for parsing and mapping binary data to python objects

Project description

Python package for mapping objects to binary data. It works with Python 2.7+


Binmapper is available from and can be installed using pip

pip install binmapper

Example usage

import binmapper
import textwrap

definition = u"""\
    bintype BinX:
        field: uint8
    bintype Bin:
        fieldX: BinX
definition = textwrap.dedent(definition)
binmap = binmapper.compile(definition)
bin = binmap.Bin()
input = io.BytesIO("\x01")

Data types

Type Byte Size Description
uint8 1 Unsigned byte
uint16 2 Unsigned short
uint32 4 Unsigned short
sint8 1 Signed byte
sint16 2 Signed short
sint32 4 Signed word
float 4 Floating point with single-precision
string n String
array n Array

Common class template

bintype CLASS_NAME:



Value Description
littlendian Increasing numeric significance with increasing memory addresses
bigendian Decreasing numeric significance with increasing memory addresses

Byteorder can be specified 3-way

  • Field attribute

    field: uint8 &byteorder=littlendian

    Apply only to field

  • BinType attribute

    field: uint8

    Apply to all fields in BinType, except having attribute byteorder

  • Parse argument

    bin.parse(input, byteorder='littlendian')

    Apply to all parsed data, except having attribute byteorder or BinType byteorder

Byteorder apply order:

`field byteorder > class byteorder > parse byteorder`

Class Usage

Array Usage

String Usage

Let Field Usage

Change elements in runtime

Project details

Release history Release notifications

This version
History Node


History Node


History Node


History Node


History Node


History Node


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date (50.5 kB) Copy SHA256 hash SHA256 Source None Jan 17, 2016

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging CloudAMQP CloudAMQP RabbitMQ AWS AWS Cloud computing Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page