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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_src_blocks(self, seed=None):
 """Returns the indices of a set of `d` source blocks `d` is sampled from the RSD described above. """


        if seed:
            self.state = seed

        blockseed = self.state
        d = self._sample_d()
        have = 0
        nums = set()
        while have < d:
            num = self._get_next() % self.K
            if num not in nums:
                nums.add(num)
                have += 1
        return blockseed, d, nums