@asyncio.coroutine<EOL><INDENT>def eth_getUncleByBlockHashAndIndex(self, bhash, index=<NUM_LIT:0>):<DEDENT>
result = yield from self.rpc_call('<STR_LIT>',<EOL>[bhash, hex(index)])<EOL>return result<EOL>
https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getunclebyblockhashandindex

        :param bhash: Block hash
        :type bhash: str

        :param index: Index position (optional)
        :type index: int

        :return: block
        :rtype: dict or None