def __setitem__(self,key,val):
        if key not in self._parsed_data:
            raise ValueError(key % "Unknown section %s")
        else:
            self._parsed_data[key] = val
dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/devtools/tests/docscrape.py/NumpyDocString.__setitem__/swapped operands of `%`