util.py 文件源码

def union(self, *others):
        union = sortedset()
        union._items = list(self._items)
        for other in others:
            if isinstance(other, self.__class__):
                i = 0
                for item in other._items:
                    i = bisect_left(union._items, item, i)
                    if i < len(union._items):
                        if item != union._items[i]:
                            union._items.insert(i, item)
                    else:
                        union._items.append(item)
            else:
                for item in other:
                    union.add(item)
        return union