def process(self, event):
        if event in self.field:
            url = event.pop(self.field)
            url.split('?', 1)
            r = urlparse.urlparse(url)
            event['path'] = r.path
            # for simplicity, ignore repeated parameters
            event.update(dict(urlparse.parse_qsl(r.query)))
dataset/ETHPy150Open artirix/logcabin/logcabin/filters/url.py/Url.process/swapped operands of `in`