code: def _getStrips(self, scraperobj):
          
          if self.options.all or self.options.cont:
              numstrips = None
          elif self.options.numstrips:
              numstrips = self.options.numstrips
          else:
              # get current strip
              numstrips = 1
          try:
              if scraperobj.isComplete(self.options.basepath):
                  out.info(u"All comics are already downloaded.")
                  return 0
              for strip in scraperobj.getStrips(numstrips):
                  skipped = self.saveComicStrip(strip)
                  if skipped and self.options.cont:
                      # stop when retrieval skipped an image for one comic strip
                      out.info(u"Stop retrieval because image file already exists")
                      break
                  if self.stopped:
                      break
              if self.options.all and not (self.errors or self.options.dry_run or
                                      self.options.cont or scraperobj.indexes):
                  scraperobj.setComplete(self.options.basepath)
          except Exception as msg:
              out.exception(msg)
              self.errors += 1
docs: Get all strips from a scraper.