in sketches/Sampler.py [0:0]
def __init__(self, topk, maxsize, seed=None):
self.topk = topk
self.maxsize = maxsize
self.buffer = [] #SortedList()
self.heavy_set = set()
self.item_dict = {}
self.threshold = float("inf")
self.processed = 0
self.seed = seed
self.rng = random.Random(seed)