I have two instances called and running. They interact with each
other and I would like one of the instances to cease to exist in the
second round based on a given condition. How do you kill an instance?

   The code is below. I have Red and Yellow as my instances and I want
them to die when life = 0 and not show up in the preceding rounds of
the game.

Thank you.
Ara




CODE HERE:
##########################################################################
#Red and Yellow yeast model
#
#Both yeast start out cooperating.
#If the yeast detect that there is no ade or lys present they will defect
#but die.
##########################################################################

import time

chemicals = []

#0 cooperates
#1 defects

class RedYeast:
#Needs adenine to grow, releases lysine
    def __init__(self,name,group):
        self.name = name
        self.group = group
        self.life = 1
        self.hate_tolerance = 0
        self.choice = 0

#METHODS
    def lys_re(self,stuffa):
#release of lys in the environment
        if self.choice == 0:
            print self.name, "-- Releasing lys"
            chemicals.append(stuffa)
        elif self.choice == 1:
            print self.name, "-- Withholds lys"

    def ade_need(self,stuffb):

        if stuffb != chemicals:
            print self.name,"is taking ade"
            self.life = self.life+1
            chemicals.remove(stuffb)
            print chemicals
            print "Life", self.life
        else:
            print "No ade presents"
            self.life = self.life-1
            self.choice = 1



class YellowYeast:
#Needs lysine to grow, releases adenine
    def __init__(self,name,group):
        self.name = name
        self.group = group
        self.life = 1
        self.hate_tolerance = 0
        self.choice = 0

#METHODS
    def ade_re(self,stuffa):
#release of lys in the environment
        if self.choice == 0:
            print self.name, "-- Releasing ade"
            chemicals.append(stuffa)
        elif self.choice == 1:
            print self.name, "-- Withholds ade"

    def lys_need(self,stuffb):

        if stuffb != chemicals:
            print self.name," is taking ade"
            self.life = self.life+1
            chemicals.remove(stuffb)
            print chemicals

            print "Life",self.life
            print
        else:
            print "No ade presents"
            self.life = self.life-1
            self.choice = 1


    def death(self):



##############################################################
#Start of program
##############################################################

rounds = raw_input("How many rounds to you wish to play through?")
print "Starting environment", chemicals
rounds =int(rounds)
count = 0

#Creates the instances for RedYeast and YellowYeast
one = RedYeast("Red","alpha")
two = YellowYeast("Yellow","alpha")

#Game logic

while count < rounds:
    print "##################################################"
    print

    one.lys_re("lys")
    two.ade_re("ade")

    print
    print "Chemicals in the environment",chemicals
    print

    time.sleep(1)

    one.ade_need("ade")
    two.lys_need("lys")

    print "##################################################"
    print


    count = count+1

print "Ending environment", chemicals

-- 
Quis hic locus, quae regio, quae mundi plaga. Ubi sum. Sub ortu solis
an sub cardine glacialis ursae.
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