def _import_ipv4(self, entrylist):  #entrylist = sorted list of pairs of ipv4s converted to longs
        assert not self.ipv4list
        if not entrylist:
            return
        entrylist.sort()
        l = []
        b1,e1 = entrylist[0]
        for b2,e2 in entrylist:
            if e1+1 <= b2:
                e1 = max(e1,e2)
            else:
                l.append((b1,e1))
                b1 = b2
                e1 = e2
        l.append((b1,e1))
        self.ipv4list = [b for b,e in l]
        for b,e in l:
            self.ipv4dict[b] = e
dataset/ETHPy150Open Cclleemm/FriendlyTorrent/src/tornado/BitTornado/iprangeparse.py/IP_List._import_ipv4/operator `>=` -> `<=`