def tags_to_new_gone(tags):
    new_tags = set()
    gone_tags = set()
    for tag in tags:
        if tag[0] == '-':
            gone_tags.add(tag[1:])
        else:
            new_tags.add(tag)
    return new_tags, gone_tags
Split a list of tags into a new_set and a gone_set.
dataset/ETHPy150Open byt3bl33d3r/pth-toolkit/lib/python2.7/site-packages/samba/external/subunit/__init__.py/tags_to_new_gone