from __future__ import annotations


def strtobool(val: str) -> int:
    """
    Copy of implementation from earlier Python versions. It is not available in python 3.12+.
    Convert a string representation of truth to true (1) or false (0).
    True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
    are 'n', 'no', 'f', 'false', 'off', and '0'. Raises ValueError if
    'val' is anything else.
    """
    val = val.lower()
    if val in ("y", "yes", "t", "true", "on", "1"):
        return 1
    if val in ("n", "no", "f", "false", "off", "0"):
        return 0
    raise ValueError(f"invalid truth value {val!r}")
