func (l *Logger) Debug(format string, v ...interface{}) {
	if DebugLevel >= l.level {
		l.Output(DebugLevel, 2, fmt.Sprintf(format, v...))
	}
}
// Printf calls l.Output to print to the logger.
// Arguments are handled in the manner of fmt.Printf.
Printf calls l.Output to print to the logger.
Arguments are handled in the manner of fmt.Printf.
// Printf calls l . Output to print to the logger . // Arguments are handled in the manner of fmt . Printf .
func (l *Logger) Debug(format string, v ...interface{}) {
	if DebugLevel >= l.level {
		l.Output(DebugLevel, 2, fmt.Sprintf(format, v...))
	}
}
func ( l * Logger ) Debug ( format string , v ... interface { } ) { if DebugLevel >= l . level { l . Output ( DebugLevel , 2 , fmt . Sprintf ( format , v ... ) ) } }
Printf calls l.Output to print to the logger.
Printf calls l . Output to print to the logger .