如果要输出本pro的路径，括号内无参，如果输出其他pro，写个字符串儿！

pro ex_routine_filepath
  ; Where is my current routine located?
  print, ROUTINE_FILEPATH()
  ;result = DIST(100)
  ; Where is the DIST routine located?
  print, ROUTINE_FILEPATH("read_xlsx")
end

结果：

C:\Users\YGDY\Desktop\ex_routine_filepath.pro
C:\Users\YGDY\Desktop\read_xlsx.pro