Argument parsing fails with unrecognized arguments

[iostapyshyn]

Following cfb784e (#27), the argument parsing appears to be broken:

(.venv) user@host:~/dir/data $ ../latency.py --variant syscall
usage: %prog <options> [-h] [-d BASE_DIR] [--dummy] [-s] [-v] [--title TITLE] [--variant VARIANT] [--runs RUNS] [--csv CSV]
%prog <options>: error: unrecognized arguments: ../latency.py
(.venv) user@host:~/dir/data $ ../latency.py --variant=syscall
usage: %prog <options> [-h] [-d BASE_DIR] [--dummy] [-s] [-v] [--title TITLE] [--variant VARIANT] [--runs RUNS] [--csv CSV]
%prog <options>: error: unrecognized arguments: ../latency.py
(.venv) user@host:~/dir/data $ ../latency.py --help
usage: %prog <options> [-h] [-d BASE_DIR] [--dummy] [-s] [-v] [--title TITLE] [--variant VARIANT] [--runs RUNS] [--csv CSV]

options:
  -h, --help            show this help message and exit
  -d BASE_DIR, --base-dir BASE_DIR
                        Directory which is used for storing the experiment data
  --dummy               Use dummy result directory
  -s, --symlink         symlink the result dir (as newest)
  -v, --verbose         increase verbosity (specify multiple times for more)
  --title TITLE         custom title of the experiment (default: Experiment class-name)
  --variant VARIANT     (default: syscall)
  --runs RUNS           (default: 32000000)
  --csv CSV             (default: False)

For the following definition of inputs:

inputs = {
    "variant": String("syscall"),
    "backend": get_backend,
    "runs": Integer(32000000),
    "csv": Bool(False),

    "arch":   lambda self: String(uname().machine),
    "host":   lambda self: String(uname().node),
    "kernel": lambda self: String(" ".join([
        uname().system, uname().release, uname().version
    ])),
}