qiskit/dagcircuit/dagcircuit.py
def depth(self):
        """Return the circuit depth.
        Returns:
            int: the circuit depth
        Raises:
            DAGCircuitError: if not a directed acyclic graph
        """
        if not nx.is_directed_acyclic_graph(self._multi_graph):
            raise DAGCircuitError("not a DAG")

        depth = nx.dag_longest_path_length(self._multi_graph) - 1
        return depth if depth != -1 else 0
def depth(self):
        """Return the circuit depth.
        Returns:
            int: the circuit depth
        Raises:
            DAGCircuitError: if not a directed acyclic graph
        """
        if not nx.is_directed_acyclic_graph(self._multi_graph):
            raise DAGCircuitError("not a DAG")

        depth = nx.dag_longest_path_length(self._multi_graph) - 1
        return depth if depth != -1 else 0
def depth ( self ) : if not nx . is_directed_acyclic_graph ( self . _multi_graph ) : raise DAGCircuitError ( "not a DAG" ) depth = nx . dag_longest_path_length ( self . _multi_graph ) - 1 return depth if depth != - 1 else 0
Return the circuit depth.
        Returns:
            int: the circuit depth
        Raises:
            DAGCircuitError: if not a directed acyclic graph
Return the circuit depth . Returns : int : the circuit depth Raises : DAGCircuitError : if not a directed acyclic graph