Daenyth

from redis import Redis  # type: ignore
from redis.client import Script  # type: ignore

def register_set_if_higher(redis: Redis) -> Script:
    """
    Returns a redis script taking one key and one argument.

    It sets the value in the key to be equal to the argument, iff the current value is unset or lower.
    It returns the amount the value was increased by, or the number itself, if the key was unset.
    """