Submitted by Construct 2.00 has been released. “Construct is a Python library for declaratively defined data structures, called ‘constructs’. These constructs can both parse data into an object and build an object into data. Constructs handle fields of either byte or bit granularity, structs, unions, sequences, repeaters, adapters, validators, switching, pointers, on-demand (lazy) parsing, and many more. The library defines a large number of primitive constructs, as well a large inventory of file formats and network protocols.”
