def find_point_in_path(path, sub):
    """Find a point in a path.

    Parameters
    ----------
    path : tuple of array_like
        Tuple of arrays of int that represent indices into a matrix.
    sub : tuple in int
        Indices to search *path* for.

    Returns
    -------
    int or None
        Index into *path* if the indices are found. Otherwise, ``None``.

    Examples
    --------
    >>> path = ((0, 1, 4, 6, 5), (3, 1, 7, 8, 10))
    >>> find_point_in_path(path, (4, 7))
    2
    >>> find_point_in_path(path, (99, 2)) is None
    True
    """
    try:
        return list(zip(*path)).index(sub)
    except ValueError:
        return None