def trace(self, msg, *args, **kwargs):
if self.isEnabledFor(TRACE):<EOL><INDENT>self._log(TRACE, msg, args, **kwargs)<EOL><DEDENT>
Log 'msg % args' with severity 'TRACE'.

To pass exception information, use the keyword argument exc_info with
a true value, e.g.

logger.trace("Houston, we have a %s", "thorny problem", exc_info=1)