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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 get_data_byte_array(self, buffer=False):
 """Return a list of data for all blocks in this chunk."""

        if buffer:
            length = len(self.dataList)
            return BytesIO(pack(">i", length)+self.get_data_byte_array())
        else:
            return array.array('B', self.dataList).tostring()