我正在尝试在数字海洋液滴上的 ubuntu 16.04.6 x64 上安装 jupyter。它给了我以下错误消息，我不明白这是什么意思。
ERROR: After October 2020 you may experience errors when installing or updating package
s. This is because pip will change the way that it resolves dependency conflicts.
We recommend you use --use-feature=2020-resolver to test your packages with the new res
olver before it becomes the default.
jsonschema 3.2.0 requires six>=1.11.0, but you'll have six 1.10.0 which is incompatible
任何帮助将不胜感激！
tl; dr:我正在寻找Python的C++替代品heapq.heapreplace.
我必须以这样的方式处理最大堆(用作优先级队列),我弹出顶部元素,减去未指定的数字,然后再次推送该修改后的元素.我可以使用just来做这个pop_heap,push_heap但是这会做不必要的工作,因为它必须修改堆两次,每次重新建立堆不变量:
std::vector<unsigned> heap;
// ...
std::pop_heap(heap.begin(), heap.end()); // Re-establishes heap invariant.
decrease(heap.back());
std::push_heap(heap.begin(), heap.end()); // Re-establishes heap invariant again.
一个有效的界面可能看起来像这样:
decrease(heap.front()); // Modify in-place.
replace_heap(heap.begin(), heap.end());
是否有一些技巧让我让STL做我想做的事情或者我必须自己写作replace_heap？