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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 _maybe_decode(self, value, encoding='utf-8'):
 """If a bytes object is passed in, in the Python 3 environment, decode it using the specified encoding to turn it to a str instance. :param mixed value: The value to possibly decode :param str encoding: The encoding to use :rtype: str """

        if _PYTHON3 and isinstance(value, bytes):
            try:
                return value.decode(encoding)
            except Exception as err:
                self.logger.exception('Error decoding value: %s', err)
                raise MessageException(
                    str(err), 'decoding-{}'.format(encoding))
        return value