def contains()

in gym/spaces/multi_discrete.py [0:0]


    def contains(self, x) -> bool:
        """Return boolean specifying if x is a valid member of this space."""
        if isinstance(x, Sequence):
            x = np.array(x)  # Promote list to array for contains check

        # if nvec is uint32 and space dtype is uint32, then 0 <= x < self.nvec guarantees that x
        # is within correct bounds for space dtype (even though x does not have to be unsigned)
        return bool(
            isinstance(x, np.ndarray)
            and x.shape == self.shape
            and x.dtype != object
            and np.all(0 <= x)
            and np.all(x < self.nvec)
        )