Модель SIMPY с закрытием, объекты получают ресурс при закрытии запуска кода ⇐ Python

[Anonymous]

У меня есть модель, где: < /p>

Доступны ресурсы между часами открытия (8 утра -8 вечера). < /p>
< /li>
Любые объекты, использующие ресурсы, выпускаются через 1 минуту до 8 вечера, а затем
for -for -recorditions для претензий на все ресурсы с -1
import simpy
import random
import math
import numpy as np

class default_params():
random.seed(10)
run_time = 10080
iterations = 1
no_resources = 4
inter_arr = 120
resource_time = 240
#shop Opening Hours
shop_open_time = 8
shop_stop_accept = 18
shop_close_time = 20

class spawn_entity:
def __init__(self, p_id):
self.id = p_id
self.arrival_time = np.nan
self.resource_gained_time = np.nan
self.leave_time = np.nan

class shop_model:
def __init__(self, run_number, input_params):
#start environment, set entity counter to 0 and set run number
self.env = simpy.Environment()
self.input_params = input_params
self.entity_counter = 0
self.run_number = run_number
#establish resources
self.resources = simpy.PriorityResource(self.env,
capacity=input_params.no_resources)

##############################MODEL TIME###############################
def model_time(self, time):
#Function to work out day and hour in the model
day = math.floor(time / (24*60))
day_of_week = day % 7
#If day 0, hour is time / 60, otherwise it is the remainder time once
#divided by number of days
hour = math.floor((time % (day*(24*60)) if day != 0 else time) / 60)
return day, day_of_week, hour

###########################ARRIVALS##################################
def arrivals(self):
yield self.env.timeout(1)
while True:
#up entity counter and spawn a new entity
self.entity_counter += 1
p = spawn_entity(self.entity_counter)
#begin entity to shop process
self.env.process(self.entity_journey(p))
#randomly sample the time until the next arrival
sampled_interarrival = round(random.expovariate(1.0
/ self.input_params.inter_arr))
yield self.env.timeout(sampled_interarrival)

######################### CLOSE SHOP ################################
def close_shop(self):
while True:
#if first day, close shop until open time, then wait until close
if self.env.now == 0:
time_closed = self.input_params.shop_open_time
time_out = self.input_params.shop_close_time
else:
#close for 12 hour overnight and time out process until next day
time_closed = 12
time_out = 24

#Take away all the resources for the close time to simulate the shop
# being closed.
print(f'--!!!!!CLOSING SHOP AT {self.env.now} FOR {time_closed * 60} MINS!!!!!--')
i=0
for _ in range(self.input_params.no_resources):
i += 1
print(f'--claiming resource {i}')
self.env.process(self.fill_shop(time_closed * 60))
print(f'--!!!!!SHOP CLOSED!!!!!--')

#Timout for timeout period until next closure.
yield self.env.timeout(time_out * 60)

def fill_shop(self, time_closed):
#If close time, take away all the resources
with self.resources.request(priority=-1) as req:
yield req
print(f'--resource claimed for close at {self.env.now} for {time_closed} mins')
yield self.env.timeout(time_closed)

######################## ENTITY JOURNEY #############################

def entity_journey(self, entity):
#Arrival
entity.arrival_time = self.env.now
day, day_of_week, hour = self.model_time(entity.arrival_time)
print(f'entity {entity.id} starting process at {entity.arrival_time}')

#If arrival hour between stop accept and close, add an extra wait
#to ensure they don't sneak in between these times
if ((hour >= self.input_params.shop_stop_accept)
and (hour < self.input_params.shop_close_time)):
#Time out until shop close, where resources will all be claimed
#then entity can wait until next open.
next_close = ((day * 60 * 24)
+ (self.input_params.shop_close_time * 60))
time_out = (next_close - entity.arrival_time) + 1
print(f'entity {entity.id} arrived in queue after stop accepting. Time out {time_out} mins until close')
yield self.env.timeout(time_out)
print(f'entity {entity.id} has waited until close at {self.env.now}')

#request resource
i=1
with self.resources.request(priority=1) as req:
#Find out current model time
time = self.env.now
print(f'entity {entity.id} requesting resource at time {time} - attempt {i}')
day, day_of_week, hour = self.model_time(time)
#Work out the minutes until the next shop stop accept time (next day
#if hour after stop accept hour)
next_stop_accept_day = (day + 1 if hour
>= self.input_params.shop_stop_accept
else day)
next_stop_accept = ((next_stop_accept_day * 60 * 24)
+ (self.input_params.shop_stop_accept * 60))
time_to_stop_accept = (next_stop_accept - time) + 1

print(f'entity {entity.id} has {time_to_stop_accept} mins until shop stops accepting')

#entity either gets resource or timesout if past stop accept time
yield req | self.env.timeout(time_to_stop_accept)

#If entity doesn't get a bed the first attempt, keep trying
#until they do
while not req.triggered:
i += 1
print(f'entity {entity.id} did not get resource as shop stopped accepting at {self.env.now}, entity waiting 2 hours then rejoining queue for attempt {i}')
#Time out for the time between stop accepting and close, to
#ensure no entities get a resource during this time.
yield self.env.timeout(((self.input_params.shop_close_time
- self.input_params.shop_stop_accept)
* 60) + 1)

print(f'entity {entity.id} requesting resource at time {self.env.now} - attempt {i}')
#entity tries again to get a resource until the next stop accept
#time.
time = self.env.now
day, day_of_week, hour = self.model_time(time)
next_stop_accept_day = (day + 1 if hour
>= self.input_params.shop_stop_accept
else day)
next_stop_accept = ((next_stop_accept_day * 60 * 24)
+ (self.input_params.shop_stop_accept
* 60))
time_to_stop_accept = (next_stop_accept - time) + 1
print(f'entity {entity.id} has {time_to_stop_accept} until shop stops accepting')

#entity either gets resource or timesout if past stop accept time
yield req | self.env.timeout(time_to_stop_accept)

#Entity got resource, record the time and randomly sample
#process time
print(f'entity {entity.id} got resource at {self.env.now} on attempt {i}')
entity.resource_gained_time = self.env.now
#Time entity spends is randomly sampled, with them being kicked out
#1 minute before 8pm.
day, day_of_week, hour = self.model_time(self.env.now)
next_close_day = (day + 1 if hour
>= self.input_params.shop_close_time
else day)
next_close = ((next_close_day * 60 * 24)
+ (self.input_params.shop_close_time * 60)) - 1
time_to_next_close = next_close - self.env.now
sampled_shop_time = round(random.expovariate(1.0
/ self.input_params.resource_time))
yield self.env.timeout(min(sampled_shop_time, time_to_next_close))

#record entity leave time
entity.leave_time = self.env.now

########################RUN#######################
def run(self):
self.env.process(self.arrivals())
self.env.process(self.close_shop())
self.env.run(until = self.input_params.run_time)

def run_the_model(input_params):
#run the model for the number of iterations specified
for run in range(input_params.iterations):
print(f"Run {run+1} of {input_params.iterations}")
model = shop_model(run, input_params)
model.run()

run_the_model(default_params)
< /code>
Иногда закрытый код работает отлично, и все ресурсы заявляются в 8 вечера, что выглядит так: < /p>
--!!!!!CLOSING SHOP AT 4080 FOR 720 MINS!!!!!--
--claiming resource 1
--claiming resource 2
--claiming resource 3
--claiming resource 4
--!!!!!SHOP CLOSED!!!!!--
--resource claimed for close at 4080 for 720 mins
--resource claimed for close at 4080 for 720 mins
--resource claimed for close at 4080 for 720 mins
--resource claimed for close at 4080 for 720 mins
< /code>
Проблема, которая у меня есть, заключается в том, что иногда, когда я закрываю магазин, не все ресурсы требуются ровно в 8 часов вечера, а некоторые действия предприятия будут сокращены до того, как будут заявлены все ресурсы, иногда даже требуя ресурса в течение короткого времени! Примером из вывода вышеуказанного кода является: < /p>
--!!!!!CLOSING SHOP AT 2640 FOR 720 MINS!!!!!--
--claiming resource 1
--claiming resource 2
--claiming resource 3
--claiming resource 4
--!!!!!SHOP CLOSED!!!!!--
--resource claimed for close at 2640 for 720 mins
--resource claimed for close at 2640 for 720 mins
entity 21 has waited until close at 2641
entity 21 requesting resource at time 2641 - attempt 1
entity 21 has 1320 mins until shop stops accepting
entity 22 has waited until close at 2641
entity 22 requesting resource at time 2641 - attempt 1
entity 22 has 1320 mins until shop stops accepting
entity 19 requesting resource at time 2642 - attempt 2
entity 19 has 1319 until shop stops accepting
entity 20 requesting resource at time 2642 - attempt 2
entity 20 has 1319 until shop stops accepting
entity 19 got resource at 2642 on attempt 2
entity 20 got resource at 2642 on attempt 2
--resource claimed for close at 2683 for 720 mins
--resource claimed for close at 2703 for 720 mins
< /code>
Здесь 2 из 4 ресурсов закрываются ровно на 2640 минут, как и ожидалось, но остальные 2 не получают до 2683 и 2703. Организации 19 и 20 могут кратко требовать ресурса, прежде чем они будут закрыты, и покинуть модель. Я не понимаю, как им удается прыгнуть впереди закрытия в очереди, так как закрытие является приоритетом -1 по сравнению с их приоритетом. Любая помощь очень ценится.

Подробнее здесь: https://stackoverflow.com/questions/796 ... de-running