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from SimPy.Simulation import *
from random import uniform,seed
import string
## Model components ------------------------
def theTime(time):
hrs=int(time/60)
min=int(time-hrs*60)
return "%s:%s" %(string.zfill(str(hrs),2),string.zfill(str(min),2))
class worker(Process):
def __init__(self,id,sim):
Process.__init__(self,sim=sim)
self.id = id
self.output = 0
self.idle = 0
self.total_idle = 0
def working_day(self,foobar):
print "%s Worker %s arrives in factory" %(theTime(self.sim.now()),self.id)
while self.sim.now()<17*60: #work till 5 pm
yield hold,self,uniform(3,10)
#print "%s Widget completed" %theTime(now())
foobar.queue.append(self)
if foobar.idle:
self.sim.reactivate(foobar)
else:
self.idle = 1 #worker has to wait for foobar service
start_idle = self.sim.now()
#print "%s Worker %s queuing for foobar machine" %(theTime(now()),self.id)
yield passivate,self #waiting and foobar service
self.output += 1
if self.idle:
self.total_idle += self.sim.now()-start_idle
self.idle=0
print "%s %s goes home, having built %d widgets today." %(theTime(self.sim.now()),self.id,self.output)
print "Worker %s was idle waiting for foobar machine for %3.1f hours" %(self.id,self.total_idle/60)
class foobar_machine(Process):
def __init__(self,sim):
Process.__init__(self,sim=sim)
self.queue=[]
self.idle=1
def foobar_Process(self):
yield passivate,self
while 1:
while len(self.queue) > 0:
self.idle=0
yield hold,self,3
served=self.queue.pop(0)
self.sim.reactivate(served)
self.idle=1
yield passivate,self
## Model -----------------------------------
class SimPy_Worker_Extend_Model(Simulation):
def run(self):
print 'SimPy_worker_extend'
self.initialize()
foo=foobar_machine(sim=self)
self.activate(foo,foo.foobar_Process(),delay=0)
john=worker("John",sim=self)
self.activate(john,john.working_day(foo),at=510) #start at 8:30 am
eve=worker("Eve",sim=self)
self.activate(eve,eve.working_day(foo),at=510)
self.simulate(until=18*60) #run simulation from midnight till 6 pm
## Expriment -------------------------------
seed(111333555)
SimPy_Worker_Extend_Model().run()
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