File: modify_dict_attr.py

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# http://python.org/sf/1303614

class Y(object):
    pass

class type_with_modifiable_dict(Y, type):
    pass

class MyClass(object):
    """This class has its __dict__ attribute completely exposed:
    user code can read, reassign and even delete it.
    """
    __metaclass__ = type_with_modifiable_dict


if __name__ == '__main__':
    del MyClass.__dict__  # if we set tp_dict to NULL,
    print MyClass         # doing anything with MyClass segfaults