如何解决创建一个全局字典来跟踪迭代
我已经用simpy创建了火车模拟,但是为了保持对火车的追踪,我计划使用字典,其中的键值可以充当“信号”状态。按键基本上是信号编号。前面的火车可以检查下一个信号是否为绿色,反之亦然。但是,该代码对于其余信号似乎运行正常,但是我想检查信号0和信号1,以使火车不产生或不发车。
我没有输入完整的代码,因为这会使它变得冗长。只是让我了解我要做什么。
这是示例代码-
signal_dict={}
def switchSignal(self,signal):
if signal == 1 or signal == 0:
signal_dict[signal]= False
return signal_dict
else:
s[signal-1] = False
return signal_dict
def switchSignal_2(self,signal):
if signal == 1 or signal == 0:
signal_dict[signal]= True
return signal_dict
else:
signal_dict[signal-1] = True
return signal_dict
class Train(object):
def __init__(self,xxxx):
xxxxxxx
xxxxxxx
def engagelock(self,car,drivetime,signals):
with self.machine.request() as request:
yield request
for signal in range(0,signals):
switchSignal(self,signal)
while signal_dict.get(signal+1) is False :
print(f"{now():s} {self.name:s} is waiting for Signal {signal+1} to turn GREEN")
yield env.timeout(60)
else:
if isdelay()[0] == True:
switchSignal(self,signal)
time_delay=round(delay()[0],2)
print(f"\n{now():s} {self.name:s} is experiencing a delay of {round((time_delay*10)/60,2)} min at Signal {signal}")
print(signal_dict)
yield env.timeout(round(time_delay*10,2))
switchSignal_2(self,signal)
def process(self,k):
here = 'London Old Oak Commons'
dest = 'Birmingham Interchange'
t1=env.now
print(f"{now():s} {self.name:s} Departed from {here:s}")
drivetime=timeTo(self.accel,self.maxV,d)
yield env.process(self.engagelock(self.name,k))
yield env.process(self.releaselock(self.name))
yield env.timeout(drivetime)
print(f"{now():s} {self.name:s} has arrived at {dest:s},Travelling time {round((env.now-t1)/60,2)} mins")
for i in range(int((stop-start)/timing)):
print(signal_dict)
while signal_dict.get(0) is False:
print(f"Train waiting to depart,congestion ahead!")
yield env.timeout(60)
else:
t = Train(i)
env.process(t.process(k,timing))
yield env.timeout(timing)
env = simpy.Environment()
env.process(trainGenerator(start=8*3600,stop=12*3600,timing=1500))
env.run()
当我尝试跟踪全局词典signal_dict时,火车生成器似乎无法在其中查看更新的值。
Total number of Signal Blocks 6
Distance Between signalling blocks is 25.17km
{0: True,1: True,2: True,3: True,4: True,5: True}
08:00:00 [Train 0] Departed from London Old Oak Commons
08:00:00 [Train 0] is experiencing a delay of 3.37 min at Signal 5
{0: True,4: False}
{0: True,5: True}
08:05:00 [Train 1] Departed from London Old Oak Commons
{0: True,5: True}
08:10:00 [Train 2] Departed from London Old Oak Commons
08:10:00 [Train 2] is experiencing a delay of 14.46 min at Signal 3
{0: True,2: False,4: True}
{0: True,5: True}
解决方法
我做了这个工作,而不是创建一个双向链接列表,而是创建了一个全球词典,并保留了火车的标志,以表示前方和后方的信号。这样,每列火车都会检查下一个信号,如果它是红色的,它将减速到下一个信号。整个项目的链接可以在这里找到-
https://github.com/abhiray92/train_simulation_simpy/blob/main/Simulation.ipynb
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