'''
  threads2.py
  Jeff Ondich, 15 November 2010

  Same as threads.py, but this time only prints a message if
  there's an apparent race condition. Note that the print statement
  itself could potentially get interrupted. How does that affect things?
'''

from threading import *

class FightingThread(Thread):
    def __init__(self, symbol):
        Thread.__init__(self)
        self.symbol = symbol

    def run(self):
        for j in range(100000):
            for k in range(len(gSharedList)):
                gSharedList[k] = self.symbol
            if gSharedList != [self.symbol] * len(gSharedList):
                print self.symbol, ':', gSharedList

gSharedList = ['x', 'x', 'x', 'x', 'x', 'x', 'x', 'x']

threadA = FightingThread('a')
threadB = FightingThread('b')

threadA.start()
threadB.start()