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Description:

pyPublicDecompWT 2.8.1.6

pyPublicDecompWT

This package provides python bindings for some of EUMETSAT’s PublicDecompWT tools.
With pyPublicDecompWT compressed xRIT (HRIT/LRIT) files can now be decompressed in-memory, directly with python!
Currently, only bindings for the tool xRITDecompress are available.
If you need other classes or functionalities, please open a pull-request!
This repository contains / mirrors the source code for the complete PublicDecompWT tool, as well.
Additionally, we provide CMake build files.
Installation
Install pyPublicDecompWT via pip:
pip install pyPublicDecompWT

The following command will verify if the installation succeeded:
python -c "import pyPublicDecompWT"

Requirements
Building from sources requires C/C++, including compiler and standard library support.

C/C++ Compiler, e.g. GNU-GCC
CMake
pybind11

Usage
from pyPublicDecompWT import xRITDecompress

# the file to decompress
compressed_file_path = "test-data/compressed_ref/H-000-MSG4__-MSG4________-HRV______-000012___-202105260000-C_"

# Legacy decompression on disk of given file path,
# this will write the decompressed file to the current working directory
xRITDecompress(compressed_file_path)

# In-memory decompression of given buffer
with open(compressed_file_path, mode="rb") as fh:
xRIT = xRITDecompress()
xRIT.decompress(fh.read())
uncompressed = xRIT.data()

xRITDecompress
To comply with the original PublicDecompWT project, the pyPublicDecompWT package provides a xRITDecompress executable as well.
Our xRITDecompress script is a near drop-in replacement for the original.
There are two changes:

We are not writing Decompressed file ... to stdout
As per UNIX convention, the short option -s is separated by a space, not by a colon.

The former can be enabled by passing -v to xRITDecompress, however, the latter can't be emulated.
Thus, the command line call has to be changed.
In addition to the -s option we added a positional argument files to enable batch processing of (multiple) files in a single call.
$ xRITDecompress --help
usage: xRITDecompress [-h] [--version] [-v] [-s FILE] [files ...]

Command line tool for manual decompression of HRIT/LRIT files.

positional arguments:
files Name of compressed HRIT/LRIT file(s)

options:
-h, --help show this help message and exit
--version show program`s version number and exit
-v, --verbose Verbose mode
-s FILE Name of compressed HRIT/LRIT file

Versioning Scheme
The versioning scheme of the python bindings is the PublicDecompWT version with the additional version of the python bindings.
Example: Version 1 of the python bindings for PublicDecompWT version 2.8.1 is 2.8.1.1