from threading import Thread
from threading import Lock
import time
import threading

date = time.strftime("%c")
readCounter = 0
readerLock = Lock()
writerLock = Lock()

allgo = threading.Condition()

class WriterOne(Thread):
    def run(self):
        global date

        writerLock.aquire()

                date = time.strftime("%c")
        print ("Writer %s has changed the date to %s \n" %(self.name ,date))

        writerLock.release()



class WriterTwo(Thread):
    def run(self):
        global date

        writerLock.aquire()

                date = global_date[::-1]
        print ("Writer %s has changed the date to %s \n" %(self.name ,date))

        writerLock.release()


class Reader(Thread):
    def run(self):
        global date
            global readCounter

            readerLock.aquire()
            readCounter = readCounter + 1
            if readCounter == 1:
                writerLock.aquire()
            readerLock.release()

            print ("Reader %s has read the date %s \n" % (self.name ,date))

            readerLock.aquire()
            readCounter = readCounter - 1
            if readCounter == 0:
                writerLock.release()
            readerLock.release()


# create 100 threads and execute each and every one of them.
def startProgram():
    wOne = WriterOne()
    wOne.start()

    wTwo = WriterTwo()
    wTwo.start()

    readerOne = Reader()
    readerOne.start()
    readerTwo = Reader()
    readerTwo.start()
    readerThree = Reader()
    readerThree.start()


startProgram()