Not

class Not(Function):
    """Implementation of logical negation (~).

    This class represents a logical NOT operation that can be performed on
    on a single arguments. It supports chaining of multiple NOT operations
    using the `~` operator.

    Parameters
    ----------
    *args : Any
        The arguments to be logically ORed together. At least two arguments
        are required.

    Raises
    ------
    ValueError
        If the number of args is not equal to one.

    Examples
    --------
    >>> a = Not(Label.key == "k1")
    >>> b = ~a

    Methods
    -------
    __invert__()
        Supports chaining of multiple `Not` operations using the `~` operator.
    """

    def __init__(self, *args):
        if len(args) != 1:
            raise ValueError("Negation only takes one argument.")
        elif isinstance(args[0], Not):
            return args[0]._args
        super().__init__(*args)

    def __invert__(self):
        """Inverts negation so return contents."""
        if isinstance(self._args, list):
            raise ValueError("Negation only takes one argument.")
        return self._args