def __getitem__(self, key):
        self.file.seek(key.start)
        if key.stop is None:
            stop = self.size
        else:
            stop = key.stop
        return self.file.read(key.start - stop)
dataset/ETHPy150Open uskudnik/amazon-glacier-cmd-interface/glacier/GlacierWrapper.py/mmap.__getitem__/swapped operands of `-`