def values(self): return _bits._getenvdict().values()
def keys(self): return _bits._getenvdict().keys()
def items(self): return _bits._getenvdict().items()
def __len__(self): return len(_bits._getenvdict())
def copy(self): return _bits._getenvdict()
def __repr__(self): return repr(_bits._getenvdict())
def __cmp__(self, other): return cmp(_bits._getenvdict(), other)