def clear(self):
        self.pulldom.clear()
        del self.pulldom
        self.parser = None
        self.stream = None
Calculates the final progress value found by the regex
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/xml/dom/pulldom.py/DOMEventStream.clear--crossover with--dataset/ETHPy150Open chriskiehl/Gooey/gooey/gui/processor.py/ProcessController._calculate_progress