Compute the ndim of result from locators

def _compute_ndim(row_loc, col_loc):
    """Compute the ndim of result from locators
    """
    row_scaler = is_scalar(row_loc)
    col_scaler = is_scalar(col_loc)

    if row_scaler and col_scaler:
        ndim = 0
    elif row_scaler ^ col_scaler:
        ndim = 1
    else:
        ndim = 2

    return ndim