def _merge_sections(sec_a, sec_b):
    '''Merge two sections

    Merges sec_a into sec_b and sets sec_a attributes to default
    '''
    sec_b.ids = list(sec_a.ids) + list(sec_b.ids[1:])
    sec_b.ntype = sec_a.ntype
    sec_b.pid = sec_a.pid

    sec_a.ids = []
    sec_a.pid = -1
    sec_a.ntype = 0
Merge two sections

    Merges sec_a into sec_b and sets sec_a attributes to default