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以下代码试图说明我想要的内容.我基本上想要两个"随机"的实例,它们彼此独立地运行.我想在一个类中种子"随机"而不影响另一个类中的"随机".我怎样才能做到这一点？

class RandomSeeded:
    def __init__(self, seed):
        import random as r1
        self.random = r1
        self.random.seed(seed)
    def get(self):
        print self.random.choice([4,5,6,7,8,9,2,3,4,5,6,7,])

class Random:
    def __init__(self):
        import random as r2
        self.random = r2
        self.random.seed()
    def get(self): 
        print self.random.choice([4,5,6,7,8,9,2,3,4,5,6,7,])

if __name__ == '__main__':
    t = RandomSeeded('asdf')
    t.get()       # random is seeded within t
    s = Random()
    s.get()       
    t.get()       # random should still be seeded within t, but is no longer