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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_hex_chain(self, index):
 """Assemble and return the chain leading from a given node to the merkle root of this tree with hash values in hex form """

        return [(codecs.encode(i[0], 'hex_codec'), i[1]) for i in self.get_chain(index)]