According to the SXSSF (Streaming Usermodel API) documentation: SXSSF (package: org.apache.poi.xssf.streaming) is an API-compatible streaming extension of XSSF to be used when very large spreadsheet
this is my code: def a(): print \'sss\' @a() def b(): print \'aaa\' b() and the Tracebackis: sss Traceback (most recent call last):