code: def construct_makeblastdb_cmd(
      filename, outdir, blastdb_exe=pyani_config.MAKEBLASTDB_DEFAULT
  ):
      
      title = os.path.splitext(os.path.split(filename)[-1])[0]
      outfilename = os.path.join(outdir, os.path.split(filename)[-1])
      return (
          "{0} -dbtype nucl -in {1} -title {2} -out {3}".format(
              blastdb_exe, filename, title, outfilename
          ),
          outfilename,
      )
docs: Returns a single makeblastdb command.
  
      - filename - input filename
      - blastdb_exe - path to the makeblastdb executable