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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _findbytes(self, bytes_, start, end, bytealigned):
 """Quicker version of find when everything's whole byte and byte aligned. """

        assert self._datastore.offset == 0
        assert bytealigned is True
        # Extract data bytes from bitstring to be found.
        bytepos = (start + 7) // 8
        found = False
        p = bytepos
        finalpos = end // 8
        increment = max(1024, len(bytes_) * 10)
        buffersize = increment + len(bytes_)
        while p < finalpos:
            # Read in file or from memory in overlapping chunks and search the chunks.
            buf = bytearray(self._datastore.getbyteslice(p, min(p + buffersize, finalpos)))
            pos = buf.find(bytes_)
            if pos != -1:
                found = True
                p += pos
                break
            p += increment
        if not found:
            return ()
        return (p * 8,)