the maybe keyword shown here, you can also .cancel() a
Платон Щукин (Редактор отдела «Экономика»)
，更多细节参见WPS下载最新地址
各地区各部门各单位第一时间研究部署学习教育方案，迅速行动起来，精心部署安排。
But at the time range was a function that returned a whole list and the syntax would instead return a range object with indexing and semantics that don’t require instantiating the whole list.
Same examples on this page, slightly easier to see and play with