usage: marko [-h] [-v] [-p PARSER] [-r RENDERER] [-e EXTENSTION] [-o OUTPUT] [document]

positional arguments:
  document              The document to convert, will use stdin if not given.

options:
  -h, --help            show this help message and exit
  -v, --version         show program's version number and exit
  -p, --parser PARSER   Specify another parser class
  -r, --renderer RENDERER
                        Specify another renderer class
  -e, --extension EXTENSTION
                        Specify the import name of extension, can be given multiple times
  -o, --output OUTPUT   Ouput to a file