Python Threading new thread

import threading
import time
import uuid
from datetime import datetime

def print_time_uuid(num=1000):
    for a in range(1,num+1):
        print(f'{a},{datetime.now()}_{uuid.uuid4().hex}\n')
        time.sleep(1)

def print_uuid_time(num=10000):
    for a in range(1,num+1):
        print(f'{a},{uuid.uuid4().hex}_{datetime.now()}\n')
        time.sleep(1)

thread1=threading.Thread(target=print_time_uuid)
thread2=threading.Thread(target=print_uuid_time)

thread1.start()
thread2.start()

thread1.join()
thread2.join()

print("All threads finished!")