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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _run_tRNA_scan(fasta_file):
 """ Run tRNA-scan-SE to predict tRNA """

    out_file = fasta_file + "_trnascan"
    se_file = fasta_file + "_second_str"
    cmd = "tRNAscan-SE -q -o {out_file} -f {se_file} {fasta_file}"
    run(cmd.format(**locals()))
    return out_file, se_file