def succ_key(self, key, default=_sentinel):
        """Get successor to key, raises KeyError if key is max key
        or key does not exist.
        """
        item = self.succ_item(key, default)
        return default if item is default else item[0]
def succ_key(self, key, default=_sentinel):
        """Get successor to key, raises KeyError if key is max key
        or key does not exist.
        """
        item = self.succ_item(key, default)
        return default if item is default else item[0]
def succ_key ( self , key , default = _sentinel ) : item = self . succ_item ( key , default ) return default if item is default else item [ 0 ]
Get successor to key, raises KeyError if key is max key
        or key does not exist.
Get successor to key raises KeyError if key is max key or key does not exist .