code: def _generate_report_all(self):
          '''Generate report for all subfolders contained by self.folder_id.'''
          assert self.workbook is not None
          count = 0
  
          # Do all subfolders
          for sid in self.folders.subfolders(self.folder_id, self.user):
              count += 1
              self._generate_for_subfolder(sid)
  
          if count == 0:
              print("I: empty workbook created: no subfolders found"f _generate_report_all(self):
          '''Generate report for all subfolders contained by self.folder_id.'''
          assert self.workbook is not None
          count = 0
  
          # Do all subfolders
          for sid in self.folders.subfolders(self.folder_id, self.user):
              count += 1
              self._generate_for_subfolder(sid)
  
          if count == 0:
              print("I: empty workbook created: no subfolders found")
docs: Generate report for all subfolders contained by self.folder_id.