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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 read_count(self, space, start, end):
 """Retrieve the normalized read count in the provided region. """

        read_counts = 0
        for read in self._bam.fetch(space, start, end):
            read_counts += 1
        return self._normalize(read_counts, self._total)