Config the behavior of :class:`Logger`.

        Control the output to show :class:`Logger.verbose` log::

            log.config(verbose=True)

        Control the output to show only the :class:`Logger.warn` and
        :class:`Logger.error` log::

            log.config(quiet=True)

def config(self, **kwargs):
        """
        Config the behavior of :class:`Logger`.

        Control the output to show :class:`Logger.verbose` log::

            log.config(verbose=True)

        Control the output to show only the :class:`Logger.warn` and
        :class:`Logger.error` log::

            log.config(quiet=True)

        """
        if 'indent' in kwargs:
            self._indent = kwargs.get('indent', 0)
        if 'verbose' in kwargs:
            self._enable_verbose = kwargs.get('verbose', False)
        if 'quiet' in kwargs:
            self._enable_quiet = kwargs.get('quiet', False)
        return self