docs: def build_blast_db_from_seqs(seqs, is_protein=False, output_dir='./',
                               HALT_EXEC=False):
      """Build blast db from seqs; return db name and list of files created
  
          **If using to create temporary blast databases, you can call
          cogent.util.misc.remove_files(db_filepaths) to clean up all the
          files created by formatdb when you're done with the database.
  
          seqs: sequence collection or alignment object
          is_protein: True if working on protein seqs (default: False)
          output_dir: directory where output should be written
           (default: current directory)
          HALT_EXEC: halt just before running the formatdb command and
           print the command -- useful for debugging
      """
  
      # Build a temp filepath
      _, tmp_fasta_filepath = mkstemp(prefix='Blast_tmp_db', suffix='.fasta')
      # open the temp file
      tmp_fasta_file = open(tmp_fasta_filepath, 'w')
      # write the sequence collection to file
      tmp_fasta_file.write(seqs.toFasta())
      tmp_fasta_file.close()
  
      # build the bast database
      db_name, db_filepaths = build_blast_db_from_fasta_path(tmp_fasta_filepath,
                                                             is_protein=is_protein,
                                                             output_dir=output_dir,
                                                             HALT_EXEC=HALT_EXEC)
  
      # clean-up the temporary file
      remove(tmp_fasta_filepath)
  
      # return the results
      return db_name, db_filepaths