qiskit/dagcircuit/dagcircuit.py
def get_op_nodes(self, op=None, data=False):

        """Deprecated. Use op_nodes()."""
        warnings.warn('The method get_op_nodes() is being replaced by op_nodes().'
                      'Returning a list of node_ids/(node_id, data) tuples is '
                      'also deprecated, op_nodes() returns a list of DAGNodes ',
                      DeprecationWarning, 2)
        if data:
            warnings.warn('The parameter data is deprecated, op_nodes() returns DAGNodes'
                          ' which always contain the data',
                          DeprecationWarning, 2)
        nodes = []
        for node in self._multi_graph.nodes():
            if node.type == "op":
                if op is None or isinstance(node.op, op):
                    nodes.append((node._node_id, node.data_dict))
        if not data:
            nodes = [n[0] for n in nodes]
        return nodes
def get_op_nodes(self, op=None, data=False):

        """Deprecated. Use op_nodes()."""
        warnings.warn('The method get_op_nodes() is being replaced by op_nodes().'
                      'Returning a list of node_ids/(node_id, data) tuples is '
                      'also deprecated, op_nodes() returns a list of DAGNodes ',
                      DeprecationWarning, 2)
        if data:
            warnings.warn('The parameter data is deprecated, op_nodes() returns DAGNodes'
                          ' which always contain the data',
                          DeprecationWarning, 2)
        nodes = []
        for node in self._multi_graph.nodes():
            if node.type == "op":
                if op is None or isinstance(node.op, op):
                    nodes.append((node._node_id, node.data_dict))
        if not data:
            nodes = [n[0] for n in nodes]
        return nodes
Deprecated. Use op_nodes().