text: from gluon.contrib.spreadsheet import Sheet
  
  def callback():
      return cache.ram('sheet1', lambda: None, None).process(request)
  
  
  def index():
      sheet = cache.ram('sheet1', lambda: Sheet(10, 10, URL('callback')), 0)
      #sheet.cell('r0c3',value='=r0c0+r0c1+r0c2',readonly=True)
      return dict(sheet=sheet)
  