class ChanMACDSeg():
    def __init__(self, start_time, start_klu, pre_seg, seg_dir):
        self.start_time = start_time
        self.end_time = None
        self.start_klu = start_klu
        self.end_klu = None
        self.klu_list = []
        self.klu_list.append(start_klu)
        self.unittf_list = []
        self.hist_set = []
        self.seg_dir = seg_dir
        self.pre = pre_seg
        self.next = None
    def set_next(self, next_seg):
        self.next = next_seg
    def add_klu(self, klu):
        self.klu_list.append(klu)
        klu.set_seg(self)
    def add_unittf(self, unittf):
        self.unittf_list.append(unittf)
        unittf.set_next(self)
    def add_histset(self, histset):
        self.hist_set.append(histset)
        histset.set_next(self)