I'd like to have the four results come out in different values here. What should I do?
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                    add `np.random.seed(value)` before `a` declaration – chlebek Apr 20 '20 at 21:05
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                    Adding np.random.seed() is no different from this result. There are four identical results. – Seungha Jeong Apr 20 '20 at 21:21
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                    2Possible duplicate of [Random numbers generation in PySpark](https://stackoverflow.com/questions/31900124/random-numbers-generation-in-pyspark) – user10938362 Apr 20 '20 at 22:05
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                    sorry, I don't understand that link answer... – Seungha Jeong Apr 20 '20 at 22:44
