code: def construct_formatdb_cmd(filename, outdir, blastdb_exe=pyani_config.FORMATDB_DEFAULT):
      
      title = os.path.splitext(os.path.split(filename)[-1])[0]
      newfilename = os.path.join(outdir, os.path.split(filename)[-1])
      shutil.copy(filename, newfilename)
      return (
          "{0} -p F -i {1} -t {2}".format(blastdb_exe, newfilename, title),
          newfilename,
      )
docs: Returns a single formatdb command.
  
      - filename - input filename
      - blastdb_exe - path to the formatdb executable