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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_checked (cmd, ret_ok=(0,), **kwargs):
 """Run command and raise PatoolError on error."""

    retcode = run(cmd, **kwargs)
    if retcode not in ret_ok:
        msg = "Command `%s' returned non-zero exit status %d" % (cmd, retcode)
        raise PatoolError(msg)
    return retcode