用Python回朔法求流水作业调度问题的代码

以下是使用 Python 实现流水作业调度问题的回溯法代码：

def scheduling(machines, jobs, current_time, current_schedule, best_schedule, best_time):
    if not jobs:
        if current_time < best_time:
            best_time = current_time
            best_schedule = current_schedule.copy()
    else:
        job = jobs.pop(0)
        for i in range(len(machines)):
            machine = machines[i]
            machine.append(job)
            time = max(current_time, sum(machine))
            if time < best_time:
                current_schedule[job] = i
                scheduling(machines, jobs, time, current_schedule, best_schedule, best_time)
                del current_schedule[job]
            machine.remove(job)
        jobs.insert(0, job)

    return best_time, best_schedule

machines = [[] for i in range(3)]
jobs = [3, 2, 6, 4, 5, 7]
current_time, current_schedule, best_schedule, best_time = 0, {}, {}, float('inf')
print(scheduling(machines, jobs, current_time, current_schedule, best_schedule, best_time))

请注意，这个回溯法代码不是最优解决方案，只是一个参考。您可以自行修改和优化，以适应您的具体需求。