def unload_key(self, key):
        """Remove key from memory, leaving file in place."""
        key_hash = self._hash_for_key(key)
        if key in self:
            del self._cache[key_hash]
def unload_key ( self , key ) : key_hash = self . _hash_for_key ( key ) if key in self : del self . _cache [ key_hash ]
Remove key from memory, leaving file in place.