import tkinter

root=tkinter.Tk()

controlWindowOpen=tkinter.intvar(root,0)

def openWindow():

if controlWindowOpen.get()==0:

controlWindowOpen.set(1)

top=tkinter.toplevel(root)

btn.wait_window(top) #一直等到窗口關(guān)閉才會(huì)執(zhí)行下一行代碼

controlWindowOpen.set(0) #上一行代碼一直不執(zhí)行controlWindowOpen.get()值就一直不會(huì)變，一直不會(huì)變就代表上面的if判斷一直不成立

btn=tkinter.button(root,text='打開新窗口',command=openWindow)

btn.pack()

root.mainloop()