code: def _post_scrape(self, value, processor=None):
          
          # Pass each value through the field's clean method
          value = [self.process(v) for v in value]
          # Filter None values
          value = [v for v in value if v is not None]
          # Pass each value through processors defined on the entity
          if processor:
              value = [processor(v) for v in value]
              value = [v for v in value if v is not None]
          # Take first unless all is specified
          if not self.all:
              value = value[0] if value else None
          log.debug('Scraped %s: %s from %s' % (self.name, value, self.selection))
          return value
docs: Apply processing to the scraped value.