## Feature In rustPython's **array** pickling, `reduce` is used. However, `reduce_ex` is used in cPython's pickle. I think we should implement `reduce_ex` in the array and use `reduce_ex` for picking. ## Execution Result There is no related python documentation, so I will attach the execution result. <img width="1381" alt="Screen Shot 2022-07-14 at 12 24 47 AM" src="https://user-images.githubusercontent.com/20068470/178771288-ed999cdb-9540-4596-9fc1-bd41050446f2.png">