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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 roll(self):
 """ Increase the age of all items in the cache by 1. Items whose age is greater than self.max_age will be removed from the cache. """

        rem = []
        for key, item in self._cache.items():
            if item[0] > self.max_age:
                rem.append(key)
            item[0] += 1

        for key in rem:
            logger.debug("TransformCache remove: %s", key)
            del self._cache[key]