import random
global codes
from threading import Thread
ascii_uppercase = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'

class makelargecode(Thread):

    def __init__(self,n):
        Thread.__init__(self)
        self.n = n
        self.codes = ''
    def makecode(self):
        for i in range(0,10):
            self.codes += random.choice(ascii_uppercase)
        return self.codes
    @staticmethod
    def wr(code):
        f = open("code.txt","a+")
        f.write(code+"\n")
        f.close


    def run(self):
        for i in range(10000000):
            makelargecode.wr(makelargecode(10).makecode())
        print "Done"



if __name__ == "__main__":
    task = makelargecode(8)
    task.start()
    task.join()