def analyze(self, fp, block):
        i = 0
        num_error = 0
        analyzer_results = []

        chi = ChiSquare()
        fp.seek(block.start)

        while i < block.length:
            j = 0
            (d, dlen) = fp.read_block()
            if not d:
                break

            while j < dlen:
                chi.reset()

                data = d[j:j+self.block_size]
                if len(data) < self.block_size:
                    break

                chi.update(data)

                if chi.chisq() >= self.CHI_CUTOFF:
                    num_error += 1
                
                j += self.block_size

                if (j + i) > block.length:
                    break

            i += dlen

        if num_error > 0:
            verdict = 'Moderate entropy data, best guess: compressed'
        else:
            verdict = 'High entropy data, best guess: encrypted'

        desc = '%s, size: %d, %d low entropy blocks' % (verdict, block.length, num_error)
        self.result(offset=block.start, description=desc, file=fp)
Perform analysis and interpretation.
dataset/ETHPy150Open devttys0/binwalk/src/binwalk/modules/heuristics.py/HeuristicCompressionAnalyzer.analyze