Python Simulation Patient-Doctor Link (Simpy, Emergency Department) -

i'm working on project describe patient flow in emergency department using simpy 2.6.

suppose there 3 doctors in intake area. process is, after seeing 1 specific doctor (say, doctor x), patient (with 80% chance) go lab. after lab test, patient return original doctor x rejoining queue.

but how can create link between patient-docotr? right patients in code "memoryless" - see random doctor after lab test. there 20 beds in total in intake area.

please me! thank in advance!!

class intake(process):     queue = [] #patient queue     idle = [] #idle pas list     busy = [] #busy pas list     waits=[] #list of wait times, d2d time     #wholetime=[] #list of whole time spent in ed     iq = [] #amount in queue when customer leaves     ndone = 0 #total number of customers have been services      = 0 #new; counter of bed occupation      def __init__(self):         process.__init__(self)         intake.idle.append(self) #initially idle      def run(self):         while intake.i <= 20: # new new new bed              yield passivate,self #remain idle until customer ready              intake.idle.remove(self)             intake.busy.append(self)              while intake.queue != []: #perform while customers in queue                 p = intake.queue.pop(0) # customer                  intake.i += 1  #new new new  bed                 intake.servicerate1 = 0.1 / (p.severity)                 intake.waits.append(now() - p.arrivaltime)                 intake.iq.append(len(intake.queue))                  servicetime = g.rnd.expovariate(intake.servicerate1)                  yield hold,self,servicetime #perform job                  intake.ndone += 1                   if rand() <=  0.8:                     lab.queue.append(p)                     if lab.idle != []:                        reactivate(lab.idle[0])                 else:                     treatment.queue.append(p)                     intake.i -= 1                     if treatment.idle != []:                        reactivate(treatment.idle[0])              intake.busy.remove(self)              intake.idle.append(self)  """ lab process (with p=0.8 patients come here)"""   class lab(process):      queue = [] #patient queue     idle = [] #idle pas list     busy = [] #busy pas list     wholetime=[] #list of whole time spent in ed     #waits=[] #list of wait times, d2d time     #hq = [] #amount in queue when customer leaves     ndone = 0 #total number of customers have been services      def __init__(self):         process.__init__(self)         lab.idle.append(self) #initially idle      def run(self):         while true:             yield passivate,self #remain idle until customer ready              lab.idle.remove(self)             lab.busy.append(self)             while lab.queue != []: #perform while customers in queue                 p = lab.queue.pop(0) # customer                  #lab.hq.append(len(lab.queue))                 servicerate2 = 1.0/(p.severity) #service rate recipricol of mean service time  #### lab                 servicetime = g.rnd.expovariate(servicerate2)                  lab.wholetime.append(now() - p.arrivaltime + servicetime)                 yield hold,self,servicetime #perform job                  #lab.wholetime.append(now() - p.arriv)                 lab.ndone += 1                   intake.i -= 1   ## new new new bed              lab.busy.remove(self)              lab.idle.append(self)