Function define

python/python3/tornado/options.py:687–710

Defines an option in the global namespace. See `OptionParser.define`.

(
    name: str,
    default: Any = None,
    type: Optional[type] = None,
    help: Optional[str] = None,
    metavar: Optional[str] = None,
    multiple: bool = False,
    group: Optional[str] = None,
    callback: Optional[Callable[[Any], None]] = None,
)

def define(
    name: str,
    default: Any = None,
    type: Optional[type] = None,
    help: Optional[str] = None,
    metavar: Optional[str] = None,
    multiple: bool = False,
    group: Optional[str] = None,
    callback: Optional[Callable[[Any], None]] = None,
) -> None:
    """Defines an option in the global namespace.

    See `OptionParser.define`.
    """
    return options.define(
        name,
        default=default,
        type=type,
        help=help,
        metavar=metavar,
        multiple=multiple,
        group=group,
        callback=callback,
    )


def parse_command_line(