Hallo, Take a look at [https://github.com/bluenote10/NimData](https://github.com/bluenote10/NimData)
"NimData is inspired by frameworks like Pandas/Spark/Flink/Thrill, and sits between the Pandas and the Spark/Flink/Thrill side. Similar to Pandas, NimData is currently non-distributed, but shares the type-safe, lazy API of Spark/Flink/Thrill." AFAIK, NimData handles just CSV. No XLS/XSLX at this time. Anyway, I guess [https://github.com/shawnye/xlsx2csv](https://github.com/shawnye/xlsx2csv) can help you out. Cheers
