SupermarketΒΆ
SimPype features used in this example: Random variables, Resource inline customization, Log custom message properties.
The scenario of the simulation is a supermaket:
|Mom| -\
) -> |Cashier|
|Single| -/
This example models the last 4 hours of a normal working day of a supermarket.
There are two types of customer (mom and single) arriving at different times and purchasing a variable number of items each.
The customers pay the goods at a cashier who takes a random service time for scanning the items and finalize the payment.
The arrival time and the number of time vary depending on the hour for both types of customer.
Both customers cease to arrive at hour 4 because of the supermarket doors have been closed and no one is allowed to enter.
Nevertheless, customers already in the supermarket will do their grocery as usual.
Moreover, there are no single customers arriving between the 2nd and 3rd hour.
The scenario is so implemented with SimPype:
# Import SimPype module
import simpype
# Import python random module
import random
# [Mandatory] Create a SimPype simulation object
sim = simpype.Simulation(id = 'supermarket')
# [Optional] Fix the seed for the pseudo-random generator
sim.seed = 42
# [Optional] Configure the log directory.
# [Default] Log are store by default in the 'current working directory/log'
sim.log.dir = 'log'
# [Optional] Disable the logging to file and print to console instead
#sim.log.file = False
#sim.log.print = True
# [Optional] Log custom message properties
sim.log.property('items')
# [Mandatory] Add at least one generator to the simulation
mom = sim.add_generator(id = 'mom')
# [Mandatory] Assign an arrival time
mom.random['arrival'] = {
# 0h
0: lambda: random.expovariate(1.0 / 60.0),
# 1h
3600: lambda: random.expovariate(1.0 / 300.0),
# 2h
7200: lambda: random.expovariate(1.0 / 180.0),
# 3h
10800: lambda: random.expovariate(1.0 / 600.0),
# 4h
# The supermarket closes and new customer are not allowed to enter
14400: lambda: None
}
mom.message.property['items'] = {
# 0h
0: lambda: random.randint(10, 50),
# 1h
3600: lambda: random.randint(5, 25),
# 2h
7200: lambda: random.randint(15, 45),
# 3h
10800: lambda: random.randint(5, 50),
}
# [Mandatory] Add at least one generator to the simulation
single = sim.add_generator(id = 'single')
# [Mandatory] Assign an arrival time
single.random['arrival'] = {
# 1h
3600: lambda: random.expovariate(1.0 / 3600.0),
# 2h
# No single comes to the supermarket
7200: lambda: None,
# 3h
10800: lambda: random.expovariate(1.0 / 30.0),
# 4h
# The supermarket closes and new customer are not allowed to enter
14400: lambda: None
}
single.message.property['items'] = {
# 1h
3600: lambda: random.randint(5, 25),
# 3h
10800: lambda: random.randint(1, 5),
}
# [Mandatory] Add at least one resource to the simulation
cashier = sim.add_resource(id = 'cashier')
# Define the cashier service behavior when receiving a message
@simpype.resource.service(cashier)
def service(self, message):
for i in range(0, message.property['items'].value):
yield self.env.timeout(random.expovariate(1.0 / 2.0))
yield self.env.timeout(random.expovariate(1.0 / 30.0))
# [Mandatory] Add a pipeline connecting the generator and the resource
p0 = sim.add_pipeline(mom, cashier)
p1 = sim.add_pipeline(single, cashier)
# [Mandatory] Run the simulation
sim.run()
sim.cfg stored under the log folder contains:
Simulation Seed: 42
Simulation Time: 14899.608748515
Execution Time: 0.158448884
sim.log stored under the log folder contains:
timestamp,message,seq_num,resource,event,items
53.388522378,mom,0,cashier,pipe.in,10
53.388522378,mom,0,cashier,pipe.out,10
63.705582990,mom,0,cashier,resource.serve,10
138.718083873,mom,1,cashier,pipe.in,39
138.718083873,mom,1,cashier,pipe.out,39
184.819829315,mom,2,cashier,pipe.in,50
221.256144325,mom,1,cashier,resource.serve,39
221.256144325,mom,2,cashier,pipe.out,50
254.736108725,mom,3,cashier,pipe.in,17
264.688144177,mom,4,cashier,pipe.in,26
385.844345447,mom,2,cashier,resource.serve,50
385.844345447,mom,3,cashier,pipe.out,17
440.480361404,mom,3,cashier,resource.serve,17
440.480361404,mom,4,cashier,pipe.out,26
477.278091226,mom,5,cashier,pipe.in,23
504.341904366,mom,4,cashier,resource.serve,26
504.341904366,mom,5,cashier,pipe.out,23
523.769979715,mom,6,cashier,pipe.in,18
556.648579069,mom,7,cashier,pipe.in,25
567.562277900,mom,8,cashier,pipe.in,41
606.954811567,mom,9,cashier,pipe.in,35
660.563541416,mom,5,cashier,resource.serve,23
660.563541416,mom,6,cashier,pipe.out,18
706.564013156,mom,6,cashier,resource.serve,18
706.564013156,mom,7,cashier,pipe.out,25
746.593836237,mom,10,cashier,pipe.in,14
747.155383264,mom,11,cashier,pipe.in,49
917.090782723,mom,7,cashier,resource.serve,25
917.090782723,mom,8,cashier,pipe.out,41
997.674205259,mom,8,cashier,resource.serve,41
997.674205259,mom,9,cashier,pipe.out,35
1094.237239136,mom,9,cashier,resource.serve,35
1094.237239136,mom,10,cashier,pipe.out,14
1135.497554920,mom,12,cashier,pipe.in,35
1155.321703927,mom,10,cashier,resource.serve,14
1155.321703927,mom,11,cashier,pipe.out,49
1203.773327065,mom,13,cashier,pipe.in,22
1230.947627207,mom,14,cashier,pipe.in,21
1288.298644241,mom,15,cashier,pipe.in,20
1297.292748821,mom,11,cashier,resource.serve,49
1297.292748821,mom,12,cashier,pipe.out,35
1352.824756211,mom,16,cashier,pipe.in,37
1367.643360603,mom,17,cashier,pipe.in,43
1409.579860824,mom,12,cashier,resource.serve,35
1409.579860824,mom,13,cashier,pipe.out,22
1481.165000235,mom,13,cashier,resource.serve,22
1481.165000235,mom,14,cashier,pipe.out,21
1531.515701299,mom,14,cashier,resource.serve,21
1531.515701299,mom,15,cashier,pipe.out,20
1560.952553042,mom,15,cashier,resource.serve,20
1560.952553042,mom,16,cashier,pipe.out,37
1632.478939040,mom,18,cashier,pipe.in,16
1684.341371340,mom,19,cashier,pipe.in,25
1690.789890052,mom,20,cashier,pipe.in,29
1708.948405492,mom,16,cashier,resource.serve,37
1708.948405492,mom,17,cashier,pipe.out,43
1804.006200358,mom,17,cashier,resource.serve,43
1804.006200358,mom,18,cashier,pipe.out,16
1804.734499582,mom,21,cashier,pipe.in,15
1821.307862556,mom,22,cashier,pipe.in,33
1859.770810879,mom,23,cashier,pipe.in,27
1865.184076185,mom,18,cashier,resource.serve,16
1865.184076185,mom,19,cashier,pipe.out,25
1881.741695100,mom,24,cashier,pipe.in,27
1943.361829976,mom,19,cashier,resource.serve,25
1943.361829976,mom,20,cashier,pipe.out,29
1959.110269015,mom,25,cashier,pipe.in,13
1968.983435168,mom,26,cashier,pipe.in,15
2041.302187370,mom,20,cashier,resource.serve,29
2041.302187370,mom,21,cashier,pipe.out,15
2097.503696012,mom,21,cashier,resource.serve,15
2097.503696012,mom,22,cashier,pipe.out,33
2196.998303435,mom,22,cashier,resource.serve,33
2196.998303435,mom,23,cashier,pipe.out,27
2264.306918367,mom,23,cashier,resource.serve,27
2264.306918367,mom,24,cashier,pipe.out,27
2275.129947122,mom,27,cashier,pipe.in,38
2334.268055485,mom,24,cashier,resource.serve,27
2334.268055485,mom,25,cashier,pipe.out,13
2402.770568286,mom,28,cashier,pipe.in,47
2408.485728182,mom,25,cashier,resource.serve,13
2408.485728182,mom,26,cashier,pipe.out,15
2465.204046373,mom,26,cashier,resource.serve,15
2465.204046373,mom,27,cashier,pipe.out,38
2568.345896853,mom,27,cashier,resource.serve,38
2568.345896853,mom,28,cashier,pipe.out,47
2694.757919705,mom,28,cashier,resource.serve,47
2811.644676457,mom,29,cashier,pipe.in,13
2811.644676457,mom,29,cashier,pipe.out,13
2842.245771344,mom,29,cashier,resource.serve,13
2956.534131679,mom,30,cashier,pipe.in,50
2956.534131679,mom,30,cashier,pipe.out,50
3018.899391741,mom,31,cashier,pipe.in,45
3046.220486290,mom,32,cashier,pipe.in,16
3084.080166937,mom,30,cashier,resource.serve,50
3084.080166937,mom,31,cashier,pipe.out,45
3113.626125282,mom,33,cashier,pipe.in,27
3115.621931164,mom,34,cashier,pipe.in,25
3174.310206816,mom,31,cashier,resource.serve,45
3174.310206816,mom,32,cashier,pipe.out,16
3215.816734770,mom,32,cashier,resource.serve,16
3215.816734770,mom,33,cashier,pipe.out,27
3231.669800033,mom,35,cashier,pipe.in,13
3333.665828154,mom,33,cashier,resource.serve,27
3333.665828154,mom,34,cashier,pipe.out,25
3443.653811732,mom,34,cashier,resource.serve,25
3443.653811732,mom,35,cashier,pipe.out,13
3470.095347275,mom,35,cashier,resource.serve,13
3624.714427551,single,0,cashier,pipe.in,13
3624.714427551,single,0,cashier,pipe.out,13
3625.381811847,mom,36,cashier,pipe.in,22
3710.465613459,single,0,cashier,resource.serve,13
3710.465613459,mom,36,cashier,pipe.out,22
3748.507941095,mom,36,cashier,resource.serve,22
4726.653621788,mom,37,cashier,pipe.in,21
4726.653621788,mom,37,cashier,pipe.out,21
4762.903334828,mom,38,cashier,pipe.in,7
4800.801917304,mom,37,cashier,resource.serve,21
4800.801917304,mom,38,cashier,pipe.out,7
4839.622135344,mom,38,cashier,resource.serve,7
4914.690171668,mom,39,cashier,pipe.in,14
4914.690171668,mom,39,cashier,pipe.out,14
4951.399238012,mom,40,cashier,pipe.in,10
4951.747273721,mom,39,cashier,resource.serve,14
4951.747273721,mom,40,cashier,pipe.out,10
4974.825368308,mom,40,cashier,resource.serve,10
4975.235400012,mom,41,cashier,pipe.in,9
4975.235400012,mom,41,cashier,pipe.out,9
5026.018139866,mom,41,cashier,resource.serve,9
5403.639546918,mom,42,cashier,pipe.in,24
5403.639546918,mom,42,cashier,pipe.out,24
5460.836646269,mom,42,cashier,resource.serve,24
5520.757041358,mom,43,cashier,pipe.in,24
5520.757041358,mom,43,cashier,pipe.out,24
5588.212113514,mom,43,cashier,resource.serve,24
5714.423806321,mom,44,cashier,pipe.in,24
5714.423806321,mom,44,cashier,pipe.out,24
5850.558660535,mom,44,cashier,resource.serve,24
6334.155611550,mom,45,cashier,pipe.in,20
6334.155611550,mom,45,cashier,pipe.out,20
6398.115520887,mom,46,cashier,pipe.in,19
6428.275478037,mom,45,cashier,resource.serve,20
6428.275478037,mom,46,cashier,pipe.out,19
6472.074069124,mom,46,cashier,resource.serve,19
6681.056449853,mom,47,cashier,pipe.in,20
6681.056449853,mom,47,cashier,pipe.out,20
6697.496991554,single,1,cashier,pipe.in,9
6725.978312572,mom,47,cashier,resource.serve,20
6725.978312572,single,1,cashier,pipe.out,9
6772.294425569,single,1,cashier,resource.serve,9
7302.777031359,mom,48,cashier,pipe.in,43
7302.777031359,mom,48,cashier,pipe.out,43
7317.634305137,mom,49,cashier,pipe.in,29
7329.310221598,mom,50,cashier,pipe.in,24
7430.251437643,mom,51,cashier,pipe.in,20
7438.117543205,mom,48,cashier,resource.serve,43
7438.117543205,mom,49,cashier,pipe.out,29
7503.277090954,mom,49,cashier,resource.serve,29
7503.277090954,mom,50,cashier,pipe.out,24
7550.085461078,mom,50,cashier,resource.serve,24
7550.085461078,mom,51,cashier,pipe.out,20
7583.221811223,mom,51,cashier,resource.serve,20
7749.610353076,mom,52,cashier,pipe.in,26
7749.610353076,mom,52,cashier,pipe.out,26
7840.970143277,mom,53,cashier,pipe.in,42
7866.978728331,mom,52,cashier,resource.serve,26
7866.978728331,mom,53,cashier,pipe.out,42
7871.819955813,mom,54,cashier,pipe.in,20
8021.307033541,mom,53,cashier,resource.serve,42
8021.307033541,mom,54,cashier,pipe.out,20
8086.713238957,mom,54,cashier,resource.serve,20
8155.933095292,mom,55,cashier,pipe.in,39
8155.933095292,mom,55,cashier,pipe.out,39
8308.744581518,mom,56,cashier,pipe.in,29
8400.944873280,mom,55,cashier,resource.serve,39
8400.944873280,mom,56,cashier,pipe.out,29
8433.065121924,mom,57,cashier,pipe.in,38
8455.844627545,mom,56,cashier,resource.serve,29
8455.844627545,mom,57,cashier,pipe.out,38
8515.029140747,mom,58,cashier,pipe.in,35
8519.890693484,mom,59,cashier,pipe.in,40
8546.994281535,mom,57,cashier,resource.serve,38
8546.994281535,mom,58,cashier,pipe.out,35
8639.080922386,mom,58,cashier,resource.serve,35
8639.080922386,mom,59,cashier,pipe.out,40
8756.522523552,mom,59,cashier,resource.serve,40
9163.855758010,mom,60,cashier,pipe.in,19
9163.855758010,mom,60,cashier,pipe.out,19
9164.790843007,mom,61,cashier,pipe.in,44
9195.733794567,mom,62,cashier,pipe.in,28
9229.064878175,mom,60,cashier,resource.serve,19
9229.064878175,mom,61,cashier,pipe.out,44
9362.266384547,mom,61,cashier,resource.serve,44
9362.266384547,mom,62,cashier,pipe.out,28
9423.001910450,mom,62,cashier,resource.serve,28
9580.780588692,mom,63,cashier,pipe.in,37
9580.780588692,mom,63,cashier,pipe.out,37
9661.614962737,mom,64,cashier,pipe.in,45
9684.635313470,mom,63,cashier,resource.serve,37
9684.635313470,mom,64,cashier,pipe.out,45
9759.778215239,mom,65,cashier,pipe.in,27
9785.926426820,mom,64,cashier,resource.serve,45
9785.926426820,mom,65,cashier,pipe.out,27
9847.272798995,mom,65,cashier,resource.serve,27
9863.812470714,mom,66,cashier,pipe.in,22
9863.812470714,mom,66,cashier,pipe.out,22
9928.203425134,mom,67,cashier,pipe.in,30
9939.328726127,mom,66,cashier,resource.serve,22
9939.328726127,mom,67,cashier,pipe.out,30
9970.380503908,mom,68,cashier,pipe.in,24
10056.619170012,mom,69,cashier,pipe.in,33
10081.623508021,mom,67,cashier,resource.serve,30
10081.623508021,mom,68,cashier,pipe.out,24
10186.609937203,mom,68,cashier,resource.serve,24
10186.609937203,mom,69,cashier,pipe.out,33
10285.760666089,mom,70,cashier,pipe.in,29
10333.963957210,mom,69,cashier,resource.serve,33
10333.963957210,mom,70,cashier,pipe.out,29
10420.001126747,mom,70,cashier,resource.serve,29
10435.595233794,mom,71,cashier,pipe.in,16
10435.595233794,mom,71,cashier,pipe.out,16
10471.174764090,mom,72,cashier,pipe.in,17
10505.868282321,mom,71,cashier,resource.serve,16
10505.868282321,mom,72,cashier,pipe.out,17
10586.274229677,mom,72,cashier,resource.serve,17
10596.226909721,mom,73,cashier,pipe.in,17
10596.226909721,mom,73,cashier,pipe.out,17
10639.173597500,mom,73,cashier,resource.serve,17
10862.472856427,mom,74,cashier,pipe.in,11
10862.472856427,mom,74,cashier,pipe.out,11
10878.440600501,mom,75,cashier,pipe.in,41
10920.645682552,mom,74,cashier,resource.serve,11
10920.645682552,mom,75,cashier,pipe.out,41
11001.175008454,mom,75,cashier,resource.serve,41
11320.204359971,mom,76,cashier,pipe.in,39
11320.204359971,mom,76,cashier,pipe.out,39
11418.040334834,mom,76,cashier,resource.serve,39
11439.221666502,mom,77,cashier,pipe.in,32
11439.221666502,mom,77,cashier,pipe.out,32
11506.414156254,mom,78,cashier,pipe.in,20
11543.046066255,mom,77,cashier,resource.serve,32
11543.046066255,mom,78,cashier,pipe.out,20
11600.623405791,mom,78,cashier,resource.serve,20
11941.808820029,mom,79,cashier,pipe.in,28
11941.808820029,mom,79,cashier,pipe.out,28
12015.436273202,mom,79,cashier,resource.serve,28
12178.510489210,mom,80,cashier,pipe.in,16
12178.510489210,mom,80,cashier,pipe.out,16
12207.193040343,mom,80,cashier,resource.serve,16
12664.201223595,mom,81,cashier,pipe.in,6
12664.201223595,mom,81,cashier,pipe.out,6
12715.083847551,mom,81,cashier,resource.serve,6
13098.775949674,single,2,cashier,pipe.in,4
13098.775949674,single,2,cashier,pipe.out,4
13119.421508520,single,2,cashier,resource.serve,4
13122.712931748,single,3,cashier,pipe.in,1
13122.712931748,single,3,cashier,pipe.out,1
13131.275269051,single,3,cashier,resource.serve,1
13165.526938783,single,4,cashier,pipe.in,4
13165.526938783,single,4,cashier,pipe.out,4
13168.768410542,single,5,cashier,pipe.in,2
13179.370630698,single,6,cashier,pipe.in,4
13188.518131864,single,7,cashier,pipe.in,1
13233.352116590,single,8,cashier,pipe.in,2
13240.419160405,single,9,cashier,pipe.in,5
13247.922008072,single,4,cashier,resource.serve,4
13247.922008072,single,5,cashier,pipe.out,2
13270.521083522,single,5,cashier,resource.serve,2
13270.521083522,single,6,cashier,pipe.out,4
13275.470920394,single,10,cashier,pipe.in,2
13305.970959407,single,6,cashier,resource.serve,4
13305.970959407,single,7,cashier,pipe.out,1
13324.581436875,single,11,cashier,pipe.in,3
13334.827986552,single,12,cashier,pipe.in,3
13422.236921087,single,7,cashier,resource.serve,1
13422.236921087,single,8,cashier,pipe.out,2
13426.173989088,single,13,cashier,pipe.in,1
13430.545193706,single,14,cashier,pipe.in,4
13469.890130609,single,8,cashier,resource.serve,2
13469.890130609,single,9,cashier,pipe.out,5
13505.858837218,single,15,cashier,pipe.in,2
13525.855461182,single,9,cashier,resource.serve,5
13525.855461182,single,10,cashier,pipe.out,2
13548.857094132,single,16,cashier,pipe.in,3
13555.297188255,single,10,cashier,resource.serve,2
13555.297188255,single,11,cashier,pipe.out,3
13578.507845571,single,17,cashier,pipe.in,4
13600.254007959,single,18,cashier,pipe.in,3
13603.505461711,single,11,cashier,resource.serve,3
13603.505461711,single,12,cashier,pipe.out,3
13617.632172212,mom,82,cashier,pipe.in,10
13635.848174634,single,19,cashier,pipe.in,4
13636.418652953,single,12,cashier,resource.serve,3
13636.418652953,single,13,cashier,pipe.out,1
13666.070809412,single,20,cashier,pipe.in,5
13681.281588370,single,21,cashier,pipe.in,4
13695.743461287,single,13,cashier,resource.serve,1
13695.743461287,single,14,cashier,pipe.out,4
13704.338968154,single,14,cashier,resource.serve,4
13704.338968154,single,15,cashier,pipe.out,2
13733.544561336,single,22,cashier,pipe.in,1
13734.955514825,single,23,cashier,pipe.in,4
13735.447975326,single,24,cashier,pipe.in,2
13752.911499520,single,25,cashier,pipe.in,1
13778.644266192,single,15,cashier,resource.serve,2
13778.644266192,single,16,cashier,pipe.out,3
13859.608792531,single,16,cashier,resource.serve,3
13859.608792531,single,17,cashier,pipe.out,4
13882.266729765,single,17,cashier,resource.serve,4
13882.266729765,single,18,cashier,pipe.out,3
13888.311805612,single,18,cashier,resource.serve,3
13888.311805612,mom,82,cashier,pipe.out,10
13897.160358595,single,26,cashier,pipe.in,2
13916.594487611,single,27,cashier,pipe.in,1
13935.970711662,mom,82,cashier,resource.serve,10
13935.970711662,single,19,cashier,pipe.out,4
13977.829554394,single,19,cashier,resource.serve,4
13977.829554394,single,20,cashier,pipe.out,5
14028.289453620,single,20,cashier,resource.serve,5
14028.289453620,single,21,cashier,pipe.out,4
14040.557714784,single,21,cashier,resource.serve,4
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