code: def convert_nexus_to_format(dataset_as_nexus, dataset_format):
      
      fake_handle = StringIO(dataset_as_nexus)
      nexus_al = AlignIO.parse(fake_handle, 'nexus')
      tmp_file = make_random_filename()
      AlignIO.write(nexus_al, tmp_file, dataset_format)
      dataset_as_fasta = read_and_delete_tmp_file(tmp_file)
      return dataset_as_fasta
docs: Converts nexus format to Phylip and Fasta using Biopython tools.
  
      :param dataset_as_nexus:
      :param dataset_format:
      :return: