I started work on this one a while back, but ended up finding a copy of the deh file as decorate so stopped refining it. It needs some work but it still gives pretty good results. When I get around to it I'll work in more edge cases as well as fold in my decorate conversion script.

It inputs a dehacked.deh and outputs a dsdhacked decohack

========

usage: deh_parser.py [-h] [-o OUTPUT] input

Convert a DeHackEd patch to human-readable DECOHack source (dsdhacked / MBF21 / dsda-doom). Can be run from
any directory.

positional arguments:
  input                input .deh/.bex file (relative paths are resolved against your current directory, as
                       usual)

options:
  -h, --help           show this help message and exit
  -o, --output OUTPUT  output .dh file (default: input name with .dh extension, written alongside the input
                       file)