def METHOD_NAME():
    """py.test make_ntgrid"""
    grid = [
        ["", "a b", "b c", "c d"],
        ["x y", 1, 2, 3],
        ["y z", 4, 5, 6],
        ["z z", 7, 8, 9],
    ]
    result = readhtml._make_ntgrid(grid)
    ntcol = collections.namedtuple("ntcol", "x_y y_z z_z")
    ntrow = collections.namedtuple("ntrow", "a_b b_c c_d")
    assert result == ntcol(
        x_y=ntrow(a_b=1, b_c=2, c_d=3),
        y_z=ntrow(a_b=4, b_c=5, c_d=6),
        z_z=ntrow(a_b=7, b_c=8, c_d=9),
    )