text: from networkx.algorithms import bipartite
  from qiskit import ClassicalRegister, QuantumRegister, QuantumCircuit
  
  
  class BipartiteGraphState(QuantumCircuit):
  
      def __init__(self, bipartite_graph):
          super().__init__()
          self.graph = bipartite_graph
          # Create a quantum register based on the number of nodes
          # in W + the number of nodes in B (= total number of nodes in G)
          self.white_nodes, self.black_nodes = bipartite.sets(self.graph)
          self.qreg = QuantumRegister(len(self.black_nodes) + len(self.white_nodes))
          self.creg = ClassicalRegister(len(self.black_nodes) + len(self.white_nodes))
          # Create a circuit using the quantum register
          self.circuit = QuantumCircuit(self.qreg, self.creg)
          # For each vertex in W, apply a Hadamard gate
          for vertex in self.white_nodes:
              self.circuit.h(vertex)
          # For each vertex in B, apply a Hadamard gate
          for vertex in self.black_nodes:
              self.circuit.h(vertex)
          # For each edge e={x,y} apply a controlled-Z gate on its vertices
          for x, y in self.graph.edges:
              self.circuit.cz(x, y)
          self.node_dict = self.build_node_dict()
  
      def build_node_dict(self):
          """
          create a node dictionary from node to integer index of a qubit
          in a Qiskit circuit
          :param self:
          """
          self.node_dict = dict()
          for count, node in enumerate(self.graph.nodes):
              self.node_dict[node] = count
  
      def x_measurement(self, qubit, cbit):
          """Measure 'qubit' in the X-basis, and store the result in 'cbit'"""
          self.circuit.h(qubit)
          self.circuit.measure(qubit, cbit)
          self.circuit.h(qubit)
  
      def x_measure_white(self):
          """
          measure the white qubits in the Pauli X-basis
          :param self:
          """
          self.circuit.barrier()
          for vertex in self.black_nodes:
              self.circuit.measure(vertex, vertex)
          self.circuit.barrier()
          for vertex in self.white_nodes:
              self.x_measurement(vertex, vertex)
  
      def x_measure_black(self):
          """
          measure the black qubits in the Pauli X-basis
          :param self:
          """
          self.circuit.barrier()
          for vertex in self.white_nodes:
              self.circuit.measure(vertex, vertex)
          self.circuit.barrier()
          for vertex in self.black_nodes:
              self.x_measurement(vertex, vertex)
  
      def apply_stabilizer(self, node):
          """
          applies the stabilizer generator corresponding to node
          :param self:
          :param node: a node in self.graph
          """
          self.circuit.x(self.node_dict[node])
          for neighbor in self.graph.neighbors(node):
              self.circuit.z(self.node_dict[neighbor])
  