def detach_network_interface(self, network_interface_id, force=False):
        params = {'NetworkInterfaceId' : network_interface_id}
        if force:
            params['Force'] = 'true'
        return self.get_status('DetachNetworkInterface', params, verb='POST')
dict op -> total number of nodes
dataset/ETHPy150Open darcyliu/storyboard/boto/ec2/connection.py/EC2Connection.detach_network_interface--crossover with--dataset/ETHPy150Open rizar/attention-lvcsr/libs/Theano/theano/compile/profiling.py/ProfileStats.op_nodes