def GenExp(child, ctx):
    if len(child) == 2:
        return child[0]
    if getattr(child[1], 'value', None) != 'for':
        return Tuple(child, ctx)
    raise NotImplementedError(child)
dataset/ETHPy150Open tailhook/pyzza/pyzza/parser.py/GenExp/operator `<` -> `==`