How to use the mdanalysis.TempContactAccumulate function in MDAnalysis

def __init__(self, key1, key2):
        super(TempContactAccumulate, self).__init__()
        self.fscore = 0  # score of current frame
        self.contributingAtomContacts = []  # contrib. atoms, later appended to AccumulatedContact's contributingAtoms list
        self.key1 = key1
        self.key2 = key2
        self.bb1score = 0
        self.bb2score = 0
        self.sc1score = 0
        self.sc2score = 0

frame_contacts_accumulated.append(currentFrameAcc)
        accumulatedContactsDict = {}
        stop = time.time()
        print(stop - start)
        # accumulatedContactsDict (dict)
        # ---> key vs. list of TempContactAccumulated
        #
        # loop fills gaps with zero-score TempContactAccumulate of key if key is not occuring in a frame
        # provides clean data!
        start = time.time()
        for key in allkeys:
            accumulatedContactsDict[key] = []
            for frame_dict in frame_contacts_accumulated:
                if not key in frame_dict:  # puts empty score TempContactAccumulate in dict
                    key1, key2 = self.makeKeyArraysFromKey(key)
                    emptyCont = TempContactAccumulate(key1, key2)
                    emptyCont.fscore = 0
                    frame_dict[key] = emptyCont
                accumulatedContactsDict[key].append(frame_dict[key])

                # make a list of AccumulatedContacts from accumulatedContactsDict
        # probably, there is a much easier way to do that, but I am too tired at the moment and it works, though... (M)
        finalAccumulatedContacts = []  # list of AccumulatedContacts
        for key in accumulatedContactsDict:
            key1, key2 = self.makeKeyArraysFromKey(key)
            acc = AccumulatedContact(key1, key2)
            for tempContact in accumulatedContactsDict[key]:
                acc.addScore(tempContact.fscore)
                acc.addContributingAtoms(tempContact.contributingAtomContacts)
                acc.bb1 += tempContact.bb1score
                acc.bb2 += tempContact.bb2score
                acc.sc1 += tempContact.sc1score

for cont in frame:
                key1, key2 = self.makeKeyArraysFromMaps(map1, map2, cont)
                key = self.makeKeyFromKeyArrays(key1, key2)
                if key in currentFrameAcc:
                    currentFrameAcc[key].fscore += cont.weight
                    currentFrameAcc[key].contributingAtomContacts.append(cont)
                    if cont.idx1 in self.backbone:
                        currentFrameAcc[key].bb1score += cont.weight
                    else:
                        currentFrameAcc[key].sc1score += cont.weight
                    if cont.idx2 in self.backbone:
                        currentFrameAcc[key].bb2score += cont.weight
                    else:
                        currentFrameAcc[key].sc2score += cont.weight
                else:
                    currentFrameAcc[key] = TempContactAccumulate(key1, key2)
                    currentFrameAcc[key].fscore += cont.weight
                    currentFrameAcc[key].contributingAtomContacts.append(cont)
                    if cont.idx1 in self.backbone:
                        currentFrameAcc[key].bb1score += cont.weight
                    else:
                        currentFrameAcc[key].sc1score += cont.weight
                    if cont.idx2 in self.backbone:
                        currentFrameAcc[key].bb2score += cont.weight
                    else:
                        currentFrameAcc[key].sc2score += cont.weight
                if not key in allkeys:
                    allkeys.append(key)
            frame_contacts_accumulated.append(currentFrameAcc)
        accumulatedContactsDict = {}
        stop = time.time()
        print(stop - start)