def warning(self, exception):
        if self._lf:
            self._lf.write("XML Warning: %s" % (exception,))
Sets the value of the ProgressIndicator. Value of the
dataset/ETHPy150Open kdart/pycopia/XML/pycopia/XML/POMparse.py/ErrorHandler.warning--crossover with--dataset/ETHPy150Open rwl/muntjac/muntjac/ui/progress_indicator.py/ProgressIndicator.setValue