code: def parse_disease_associations(path: str, excluded_disease_ids: set):
      
      if os.path.isdir(path) or not os.path.exists(path):
          logger.info("Couldn't find the disease associations file. Returning empty list.")
          return {}
  
      disease_associations = defaultdict(list)
      with open(path) as input_file:
          for line in input_file:
              target_id, disease_id = line.strip().split(" ")
              if disease_id not in excluded_disease_ids:
                  disease_associations[target_id].append(disease_id)
      return disease_associations
docs: Parse the disease-drug target associations file.
  
      :param str path: Path to the disease-drug target associations file.
      :param list excluded_disease_ids: Identifiers of the disease for which drug targets are being predicted.
      :return: Dictionary of drug target-disease mappings.