def add(self, key):

        key = key.strip()
        try:
            return self.dct[key]
        except __HOLE__:
            res = self.dct[key] = self.counter
            self.counter += 1
            return res
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/tablib-0.10.0/tablib/packages/openpyxl/writer/strings.py/StringTableBuilder.add