def __new__(cls, name, bases, attrs):
        if '_lookup' == attrs:
            lookup = {}
            for k, v in six.iteritems(attrs):
                if isinstance(v, six.integer_types):
                    lookup.setdefault(v, k)
            attrs['_lookup'] = lookup

        return super(EnumerationMeta, cls).__new__(cls, name, bases, attrs)
dataset/ETHPy150Open theatlantic/django-cropduster/cropduster/standalone/metadata.py/EnumerationMeta.__new__/operator `not in` -> `==`