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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_log_level(self):
 """ Inspects config and sets the log level as instance attr. If not present in config, default is "INFO". """

        # set log level on logger
        log_level = "INFO"
        if hasattr(self._config, "level") and self._config.level.upper() in ["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"]:
            log_level = self._config.level.upper()
        self._log_level = log_level