util.py 文件源码

def __setattr__(self, key, val):
        if key in Dict.__reserved_names__:
            # Either let OrderedDict do its work, or disallow
            if key not in Dict.__pure_names__:
                return _dict.__setattr__(self, key, val)
            else:
                raise AttributeError('Reserved name, this key can only ' +
                                     'be set via ``d[%r] = X``' % key)
        else:
            # if isinstance(val, dict): val = Dict(val) -> no, makes a copy!
            self[key] = val