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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 set_stderrthreshold(s):
 """Sets the stderr threshold to the value passed in. Args: s: str|int, valid strings values are case-insensitive 'debug', 'info', 'warning', 'error', and 'fatal'; valid integer values are logging.DEBUG|INFO|WARNING|ERROR|FATAL. Raises: ValueError: Raised when s is an invalid value. """

  if s in converter.ABSL_LEVELS:
    FLAGS.stderrthreshold = converter.ABSL_LEVELS[s]
  elif isinstance(s, str) and s.upper() in converter.ABSL_NAMES:
    FLAGS.stderrthreshold = s
  else:
    raise ValueError(
        'set_stderrthreshold only accepts integer absl logging level '
        'from -3 to 1, or case-insensitive string values '
        "'debug', 'info', 'warning', 'error', and 'fatal'. "
        'But found "{}" ({}).'.format(s, type(s)))