<s> typecls = __builtins__ . TypeClass <EOL> class ReferenceType ( typecls ) : <EOL> pass <EOL> class CallableProxyType ( typecls ) : <EOL> pass <EOL> class ProxyType ( typecls ) : <EOL> pass <EOL> ProxyTypes = ( ProxyType , CallableProxyType ) <EOL> WeakValueDictionary = dict <EOL> WeakKeyDictionary = dict </s>
