from threading import Thread, Barrier
import logging
import time

logging.basicConfig(level=logging.INFO,
    format="[thread: %(threadName)s] [%(asctime)s] %(message)s",
    datefmt="%F %T")

logger = logging.getLogger(__name__)

b = Barrier(2)


def func(b):
    logger.info("enter barrier")
    b.wait()
    logger.info("leave barrier")

if __name__ == "__main__":
    logger.info("first time")
    t = Thread(target=func, args=(b, ), name="t1", daemon=False)
    t.start()

    time.sleep(1)
    b.wait() 

    time.sleep(1)

    logger.info("second time")
    t = Thread(target=func, args=(b, ), name="t2", daemon=False)
    t.start()
    
    time.sleep(2)
    b.wait()