<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def single_line_stdout(cmd, expected_errors=(), shell=True, sudo=False, quiet=False):
 """ Runs a command and returns the first line of the result, that would be written to `stdout`, as a string. The output itself can be suppressed. :param cmd: Command to run. :type cmd: unicode :param expected_errors: If the return code is non-zero, but found in this tuple, it will be ignored. ``None`` is returned in this case. :type expected_errors: tuple :param shell: Use a shell. :type shell: bool :param sudo: Use `sudo`. :type sudo: bool :param quiet: If set to ``True``, does not show any output. :type quiet: bool :return: The result of the command as would be written to `stdout`. :rtype: unicode """

    return single_line(stdout_result(cmd, expected_errors, shell, sudo, quiet))