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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 cache_backend(self):
 """ Get the cache backend Returns ~~~~~~~ Django cache backend """

        if not hasattr(self, '_cache_backend'):
            if hasattr(django.core.cache, 'caches'):
                self._cache_backend = django.core.cache.caches[_cache_name]
            else:
                self._cache_backend = django.core.cache.get_cache(_cache_name)

        return self._cache_backend