def METHOD_NAME(a, axis):
    """Expands given arrays.
    Args:
        a (cupy.ndarray): Array to be expanded.
        axis (int): Position where new axis is to be inserted.
    Returns:
        cupy.ndarray: The number of dimensions is one greater than that of
        the input array.
    .. seealso:: :func:`numpy.expand_dims`
    """
    if type(axis) not in (tuple, list):
        axis = axis,
    return _manipulation._expand_dims(a, axis)