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""" bank06: Many Random Customers """
from SimPy.Simulation import Simulation, Process, hold
from random import expovariate, seed
## Model components ------------------------
class Source(Process):
""" Source generates customers at random """
def generate(self, number, meanTBA):
for i in range(number):
c = Customer(name = "Customer%02d" % (i), sim=self.sim)
self.sim.activate(c, c.visit(timeInBank=12.0))
t = expovariate(1.0 / meanTBA)
yield hold, self, t
class Customer(Process):
""" Customer arrives, looks round and leaves """
def visit(self, timeInBank=0):
print("%7.4f %s: Here I am" % (self.sim.now(), self.name))
yield hold, self, timeInBank
print("%7.4f %s: I must leave" % (self.sim.now(), self.name))
## Model -----------------------------------
class BankModel(Simulation):
def run(self, aseed):
""" PEM """
seed(aseed)
s = Source(name='Source', sim=self)
self.activate(s, s.generate(number=maxNumber,
meanTBA=ARRint), at=0.0)
self.simulate(until=maxTime)
## Experiment data -------------------------
maxNumber = 5
maxTime = 400.0 # minutes
ARRint = 10.0 # mean arrival interval, minutes
seedVal = 99999
## Experiment ------------------------------
mymodel = BankModel()
mymodel.run(aseed=seedVal)
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