def __delitem__(self, key):
        '''
        Make sure to remove the key cache time
        '''
        del self._key_cache_time[key]
        self._dict.__delitem__(key)
        # Do the same as the parent but also persist
        self.store()
def __delitem__ ( self , key ) : del self . _key_cache_time [ key ] self . _dict . __delitem__ ( key ) self . store ( )
Make sure to remove the key cache time