Testing Python3 Threading

asyncletter.py

from threading import Thread, Lock
from random import randint
from time import sleep

class AsyncLetter(Thread):
    
    def __init__(self, letter):
        super().__init__()
        
        self.timer = randint(1,5)
        self.letter = letter
    
    def getTime(self):
        return self.timer
    
    def run(self):
        
        sleep(self.timer)
        lock.acquire()
        print(f'[{self.timer}] {self.letter}')
        lock.release()

lock = Lock()
for letter in ['first', 'second', 'third', 'fourth', 'fifth', 'sixth']:
    AsyncLetter(letter).start()