不能让资源在某个时间段内不可用

Question

代码如下。实际上，我有两个节点 0 和 1，其中服务器容量分别为 5 和 7。服务器每天上午 9 点前（午夜起 540 分钟）和下午 6 点后不可用。我正在尝试使用超时创建不可用但不工作。我仍然看到项目在第二天下午 6 点之后（即 2520 分钟后）进入节点 0 和 1。无法找出错误。非常感谢！

import numpy as np
import simpy

def interarrival():
    return(np.random.exponential(20))

def servicetime():
    return(np.random.exponential(60))


def servicing(env, servers_1):
    i = 0
    while(True):
        i = i+1
        yield env.timeout(interarrival())
        print("Customer "+str(i)+ " arrived in the process at "+str(env.now))
        state = 0
        env.process(items(env, i, servers_array, state))

def items(env, customer_id, servers_array, state):
    with servers_array[state].request() as request:
        yield request
        t_arrival = env.now
        print("Customer "+str(customer_id)+ " arrived in "+str(state)+ "  at "+str(t_arrival))
        yield env.timeout(servicetime())
        t_depart = env.now
        print("Customer "+str(customer_id)+ " departed from "+str(state)+ "  at "+str(t_depart))
        if (state == 1):
            print("Customer exits")
        else:
            state = 1
            env.process(items(env, customer_id, servers_array, state))

def delay(env, servers_array):
    while(True):
        #print(servers_array[0].request())
        if (env.now%1440 >= 540 and env.now%1440 < 1080):
            yield env.timeout(1080 - env.now%1440)
        else:
            print(str(env.now), "at resources will be blocked")
            resource_unavailability_dict = dict()
            resource_unavailability_dict[0] = []
            resource_unavailability_dict[1] = []
            for nodes in resource_unavailability_dict:
                for _ in range(servers_array[nodes].capacity):
                    resource_unavailability_dict[nodes].append(servers_array[nodes].request())
            print(resource_unavailability_dict)
            for nodes in resource_unavailability_dict:
                yield env.all_of(resource_unavailability_dict[nodes])
            if (env.now < 540):
                yield env.timeout(540)
            else:
                yield env.timeout((int(env.now/1440)+1)*1440+540 - env.now)
            for nodes in resource_unavailability_dict:
                for request in resource_unavailability_dict[nodes]:
                    servers_array[nodes].release(request)
            print(str(env.now), "resources are released")
            

env = simpy.Environment()
servers_array = []
servers_array.append(simpy.Resource(env, capacity = 5))
servers_array.append(simpy.Resource(env, capacity = 7))
env.process(servicing(env, servers_array))
env.process(delay(env,servers_array))
env.run(until=2880)

Answer 1

我想我找到了。你屈服于 int 表达，我认为你需要用超时事件包装你的 int 表达式

尝试改变

yield(1080 - env.now%1440)

至

yield env.timeout(1080 - env.now%1440)

在延迟中，我不知道如果您的 int 表达式将负值传递给超时会发生什么。您可能需要为此添加一个支票

不能让资源在某个时间段内不可用

Can't make resources unavailable in a certain time period

resources

simpy

availability