schedule定期器与mainloop冲突

窗体不能显示，请问如何解决
import schedule
import time
from tkinter import *

root = Tk()
root.geometry('1600x900+50+50')
def job():
print('yunxing')
schedule.every(1).seconds.do(job)
while True:
schedule.run_pending()
time.sleep(1)
root.mainloop()