qiskit/dagcircuit/dagcircuit.py
def nodes_on_wire(self, wire, only_ops=False):
        """
        Iterator for nodes that affect a given wire

        Args:
            wire (tuple(Register, index)): the wire to be looked at.
            only_ops (bool): True if only the ops nodes are wanted
                        otherwise all nodes are returned.
        Yield:
             DAGNode: the successive ops on the given wire

        Raises:
            DAGCircuitError: if the given wire doesn't exist in the DAG
        """
        current_node = self.input_map.get(wire, None)

        if not current_node:
            raise DAGCircuitError('The given wire %s is not present in the circuit'
                                  % str(wire))

        more_nodes = True
        while more_nodes:
            more_nodes = False
            # allow user to just get ops on the wire - not the input/output nodes
            if current_node.type == 'op' or not only_ops:
                yield current_node

            # find the adjacent node that takes the wire being looked at as input
            for node, edges in self._multi_graph.adj[current_node].items():
                if any(wire == edge['wire'] for edge in edges.values()):
                    current_node = node
                    more_nodes = True
                    break
def nodes_on_wire(self, wire, only_ops=False):
        current_node = self.input_map.get(wire, None)

        if not current_node:
            raise DAGCircuitError('The given wire %s is not present in the circuit'
                                  % str(wire))

        more_nodes = True
        while more_nodes:
            more_nodes = False
            # allow user to just get ops on the wire - not the input/output nodes
            if current_node.type == 'op' or not only_ops:
                yield current_node

            # find the adjacent node that takes the wire being looked at as input
            for node, edges in self._multi_graph.adj[current_node].items():
                if any(wire == edge['wire'] for edge in edges.values()):
                    current_node = node
                    more_nodes = True
                    break
def nodes_on_wire ( self , wire , only_ops = False ) : current_node = self . input_map . get ( wire , None ) if not current_node : raise DAGCircuitError ( 'The given wire %s is not present in the circuit' % str ( wire ) ) more_nodes = True while more_nodes : more_nodes = False # allow user to just get ops on the wire - not the input/output nodes if current_node . type == 'op' or not only_ops : yield current_node # find the adjacent node that takes the wire being looked at as input for node , edges in self . _multi_graph . adj [ current_node ] . items ( ) : if any ( wire == edge [ 'wire' ] for edge in edges . values ( ) ) : current_node = node more_nodes = True break
Iterator for nodes that affect a given wire

        Args:
            wire (tuple(Register, index)): the wire to be looked at.
            only_ops (bool): True if only the ops nodes are wanted
                        otherwise all nodes are returned.
        Yield:
             DAGNode: the successive ops on the given wire

        Raises:
            DAGCircuitError: if the given wire doesn't exist in the DAG
Iterator for nodes that affect a given wire