运行Qiskit VQE算法出现TwoLocal相关AttributeError问题咨询

该报错由Qiskit版本迭代带来的API不兼容导致：Qiskit 0.45及后续版本移除了TwoLocal类的set_max_evals_grouped方法，而你当前调用的VQE接口版本仍会默认尝试调用该方法实现分组评估逻辑，因此触发属性不存在的报错。除此之外你的代码还存在VQE初始化参数错误的问题。

• 修正VQE初始化逻辑：你已经提前实例化了SLSQP优化器对象classical_optimizer，初始化VQE时需要传入该实例而非SLSQP类本身；同时注意新版VQE的参数顺序，哈密顿量不需要在初始化时传入，而是在执行计算时传入。
• 适配版本不需要降级依赖，按下方修正后的代码调整即可解决问题。

from qiskit_nature.drivers import PySCFDriver, UnitsType
from qiskit_nature.problems.second_quantization.electronic import ElectronicStructureProblem
from qiskit_nature.mappers.second_quantization import JordanWignerMapper
from qiskit_nature.converters.second_quantization import QubitConverter
from qiskit import BasicAer
from qiskit.utils import QuantumInstance
from qiskit.algorithms.optimizers import SLSQP
from qiskit.circuit.library import TwoLocal
from qiskit.algorithms import VQE

driver = PySCFDriver(atom='Li .0 .0 .0; H .0 .0 1.5049', unit=UnitsType.ANGSTROM, charge=0, spin=0, basis='sto3g')

# 创建二次量子化算符
es_problem = ElectronicStructureProblem(driver)
seconded_quantised_operator = es_problem.second_q_ops() 
print(seconded_quantised_operator)

# 转换为量子比特算符
qubit_transformation = QubitConverter(JordanWignerMapper())
qubit_operator = qubit_transformation.convert(seconded_quantised_operator[0])
print(qubit_operator) 

# 设置模拟器
backend = BasicAer.get_backend('statevector_simulator')
quantum_instance = QuantumInstance(backend=backend)

# VQE算法配置
groundstate_energies = []
classical_optimizer = SLSQP(maxiter = 1000)
ansatz = TwoLocal(rotation_blocks='ry', entanglement_blocks='cz')

# 可选兼容逻辑：如果修改后仍报相同错误，取消注释下一行即可
# ansatz.set_max_evals_grouped = lambda _: None

# 修正VQE初始化逻辑
vqe = VQE(ansatz=ansatz, optimizer=classical_optimizer, quantum_instance=quantum_instance)
# 执行计算获取基态能量
result = vqe.compute_minimum_eigenvalue(qubit_operator)
print("基态能量计算结果：", result.eigenvalue.real)

内容的提问来源于stack exchange，提问作者shaun fuller