"""threadingSample.py  shows how threading works

BUG: if a KeyboardInterrupt is raised during the "while" loop,
  (after the main thread is done with countUp)
   then control is never returned to a Windows(r) console.
   """
import threading
import random

def countUp(index,timer):
    global result, earlyExit
    name = threading.currentThread().getName()
    for i in range(1,101):
        if earlyExit.isSet():
            print 'earlyExit %s' % name
            break
        result[index] = i
        wait = random.random() * timer
        print "count=%3d wait=%4.2f thread= %s\n" %(result[index], wait, name),
        earlyExit.wait(wait)
            
result = [None,None,None]
earlyExit = threading.Event()

T1 = threading.Thread(target=countUp,name='a',args=(1,2))        
T2 = threading.Thread(target=countUp,name='b',args=(2,3))
T1.start()
T2.start()
try:
    countUp(0,1)
    while T1.isAlive() or T2.isAlive():
        print 'Result = %s **Hit <Ctrl-C> now to show the bug.**'%result
        T1.join(5)
        if not T1.isAlive():
            print '*****T1 is done'
        T2.join(5)
        if not T2.isAlive():
            print 'T2 is also done'
except KeyboardInterrupt:
    print 'KeyboardInterrupt'
    earlyExit.set()
print 'All done.'