def get(self, contig, start, end):
        '''return intervals overlapping with key.'''
        if contig not in self.mIndex:
            raise KeyError(contig % "contig %s not in index")

        return self.mIndex[contig].find(start, end)
dataset/ETHPy150Open CGATOxford/cgat/CGAT/IndexedGenome.py/IndexedGenome.get/swapped operands of `%`