def copy(self):
        raise NotImplementedError
Check write/read roundtrip for simple data.
dataset/ETHPy150Open binux/pyspider/pyspider/database/base/taskdb.py/TaskDB.copy--crossover with--dataset/ETHPy150Open jjhelmus/nmrglue/nmrglue/fileio/tests/test_pipe.py/check_simple_roundtrip