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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 getStringForBytes(self, s):
 """ Returns the corresponding string for the supplied utf-8 encoded bytes. If there is no string object, one is created. @since: 0.6 """

        h = hash(s)
        u = self._unicodes.get(h, None)

        if u is not None:
            return u

        u = self._unicodes[h] = s.decode('utf-8')

        return u