def _delete(self, key):
        try:
            del self._cache[key]
        except __HOLE__:
            pass
        try:
            del self._expire_info[key]
        except KeyError:
            pass
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/core/cache/backends/locmem.py/CacheClass._delete