python3-construct - 2.10.68+dfsg1-2 main

Construct is a Python library for parsing and building of data structures
(binary or textual).
.
It is based on the concept of defining data structures in a declarative
manner, rather than procedural code: more complex constructs are composed of
a hierarchy of simpler ones. It's the first library that makes parsing
fun, instead of the usual headache it is today.