code: def _prepare_resource_chunks(self, resources, resource_delim=','):
          
          return [self._prepare_resource_chunk(resources, resource_delim, pos)
                  for pos in range(0, len(resources), self._resources_per_req)]
docs: As in some VirusTotal API methods the call can be made for multiple
          resources at once this method prepares a list of concatenated resources
          according to the maximum number of resources per requests.
  
          Args:
              resources: a list of the resources.
              resource_delim: a string used to separate the resources.
                Default value is a comma.
          Returns:
              A list of the concatenated resources.