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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 get(self, key, default=None):
 """ Retreive a value from the cache. In the event the value does not exist, return the ``default``. """

        key = self.make_key(key)

        if self.debug:
            return default

        try:
            value = self.database[key]
        except KeyError:
            self.metrics['misses'] += 1
            return default
        else:
            self.metrics['hits'] += 1
            return pickle.loads(value)