| def _no_mutation(self, *args, **kwargs): |
| raise NotImplementedError(f"'{type(self).__name__}' object does not support mutation") |
| |
| def _create_immutable_container(base, mutable_functions): |
| container = type('immutable_' + base.__name__, (base,), {}) |
| for attr in mutable_functions: |
| setattr(container, attr, _no_mutation) |
| return container |
| |
| immutable_list = _create_immutable_container(list, |
| ['__delitem__', '__iadd__', '__imul__', '__setitem__', 'append', |
| 'clear', 'extend', 'insert', 'pop', 'remove']) |
| immutable_list.__reduce__ = lambda self: (immutable_list, (tuple(iter(self)),)) |
| |
| immutable_dict = _create_immutable_container(dict, ['__delitem__', '__setitem__', 'clear', 'pop', 'popitem', 'update']) |
| immutable_dict.__reduce__ = lambda self: (immutable_dict, (iter(self.items()),)) |
