https://github.com/ethereum/go-ethereum/wiki/Management-APIs#admin_startrpc

        :param host: Network interface to open the listener socket (optional)
        :type host: str

        :param port: Network port to open the listener socket (optional)
        :type port: int

        :param cors: Cross-origin resource sharing header to use (optional)
        :type cors: str

        :param apis: API modules to offer over this interface (optional)
        :type apis: str

        :rtype: bool

def admin_startRPC(self, host='localhost', port=8545, cors=None, apis=None):
        """https://github.com/ethereum/go-ethereum/wiki/Management-APIs#admin_startrpc

        :param host: Network interface to open the listener socket (optional)
        :type host: str

        :param port: Network port to open the listener socket (optional)
        :type port: int

        :param cors: Cross-origin resource sharing header to use (optional)
        :type cors: str

        :param apis: API modules to offer over this interface (optional)
        :type apis: str

        :rtype: bool
        """
        if cors is None:
            cors = []
        if apis is None:
            apis = ['eth', 'net', 'web3']

        return (yield from self.rpc_call('admin_startRPC',
                                         [host, port,
                                          ','.join(cors), ','.join(apis)]))