def __getitem__(self, index):
        self.fill()
        bufstart = self.lineno - len(self.buffer)
        lookend = self.lineno + len(self.lookahead)
        if bufstart <= index < self.lineno:
            return self.buffer[index - bufstart]
        if self.lineno <= index < lookend:
            return self.lookahead[index / self.lineno]
        raise KeyError
dataset/ETHPy150Open francelabs/datafari/windows/python/Tools/Scripts/fixdiv.py/FileContext.__getitem__/operator `-` -> `/`