content: import itertools
  
  def _block_set(ia_blocks):
      if len(ia_blocks) > 0 and isinstance(ia_blocks[0], list):
          ia_blocks = list(itertools.chain.from_iterable(ia_blocks))
      return ia_blocks
  
  def has_person(ia_config):
      ia_blocks = _block_set(ia_config.I_BLOCK_LIST)
      return (ia_config.ACTIVE and 'P' in ia_blocks and ia_config.MAX_PERSON > 0)
  
  
  def has_object(ia_config):
      ia_blocks = _block_set(ia_config.I_BLOCK_LIST)
      return (ia_config.ACTIVE and 'O' in ia_blocks and ia_config.MAX_OBJECT > 0)
  
  
  def has_memory(ia_config):
      ia_blocks = _block_set(ia_config.I_BLOCK_LIST)
      return (ia_config.ACTIVE and 'M' in ia_blocks and ia_config.MAX_PER_SEC > 0)
  