$ PyGrok.py --help
usage: PyGrok.py [-h] (<script file> | -c <code>) [<options>]

    Execute a Grok script.
    Executing a script is as easy as:
        PyGrok.py <script file>
    You can also execute code directly using the -c/--code flag:
        PyGrok.py -c '1z23zzq'
        > 132
    The -v and -s flags can be used to prepopulate the stack:
        PyGrok.py echo.grk -s "hello, world" -v 32 49 50 51 -s "456"
        > hello, world 123456

optional arguments:
  -h, --help            show this help message and exit

code:
  script                .grk file to execute
  -c <code>, --code <code>
                        string of instructions to execute

options:
  -s <string>, --string <string>
  -v <number> [<number> ...], --value <number> [<number> ...]
                        push numbers or strings onto the stack before execution starts
  -t <seconds>, --tick <seconds>
                        define a tick time, or a delay between the execution of each instruction
  -a, --always-tick     make every instruction cause a tick (delay), even whitespace and skipped instructions
  -e, --show-errors     disable "You don't grok Grok." error message and show true error message