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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 coverageInfo(self):
 """ Return information about the bases found at each location in our title sequence. @return: A C{dict} whose keys are C{int} subject offsets and whose values are unsorted lists of (score, base) 2-tuples, giving all the bases from reads that matched the subject at subject location, along with the bit score of the matching read. """

        result = defaultdict(list)

        for titleAlignment in self:
            for hsp in titleAlignment.hsps:
                score = hsp.score.score
                for (subjectOffset, base, _) in titleAlignment.read.walkHSP(
                        hsp, includeWhiskers=False):
                    result[subjectOffset].append((score, base))

        return result