Dependencies:
lxml

Should be a dependency but is included in distro:
ply
lzw

Dependencies for graph support:
matplotlib

Usage:
$ python opaf.py --help
Usage: opaf.py [options]

Options:
  -h, --help            show this help message and exit
  -x XML, --xmlfile=XML
                        Generate an xml file.
  -l LOG, --logfile=LOG
                        Dump log messages to LOG file.
  -i, --interactive     Throw interactive python shell
  -g GRAPH, --graph=GRAPH
                        Generate and dump graph to GRAPH.
  -d, --decompress      Apply a filter pack to decompress and parse object
                        streams.
  -f, --filter          Filter out all shaddy object type and dictionary key.
  -s, --stats           Dump some statistics to the log.
  -o PDF, --output_pdf=PDF
                        RE-Generate a pdf file.