我有一些代碼通過 telnet 會話將一些代碼推送到機器上。在此期間（大約 30 秒），GUI (tkinter) 掛起，似乎程序崩潰了。為了解決這個問題，我想使用進度條。因此，按下“發送”按鈕后，它會打開一個新屏幕。到現在為止還挺好?，F在，我希望進度條在 telnet 腳本完成后停止。所以我研究了一下，我認為我需要使用（多）線程。一旦 telnetthread 完成，progressbarthread 應該停止，我再次看到主屏幕。這是迄今為止的腳本...from tkinter import Button, Tk, HORIZONTALimport timefrom tkinter.ttk import Progressbarimport threadingclass main(Tk): def __init__(self): super().__init__() self.btn = Button(self, text='Run', command=self.pb) self.btn.grid(row=0,column=0) def pb(self): def real_pb(): window = tk.Toplevel(root) window.progress = Progressbar(window, orient=HORIZONTAL,length=100, mode='indeterminate') window.progress.grid(row=1,column=0) window.progress.start() time.sleep(10)#to be changed to thread of telnet session//dummyscript window.progress.stop() window.progress.grid_forget() window.destroy() self.btn['state']='normal' self.btn['state']='disabled' threading.Thread(target=real_pb).start() def dummyscript(): time.sleep(10) print("slept")root = main()root.mainloop()如何更改time.sleepdummyscript 的長度？
1 回答
慕俠2389804
TA貢獻1719條經驗 獲得超6個贊
首先，Tkinter 不支持多線程，所以所有關于 GUI 的代碼都應該在主線程中。所以無法在real_pb().
只要進程正在運行，我會做的是使用一個threading.Event在進程完成時將設置的對象。在 Tkinter mainloop 內部，我會定期輪詢 Event 以了解進程是否完成：
from tkinter import Button, Tk, HORIZONTAL, Toplevel
import time
from tkinter.ttk import Progressbar
import threading
class Main(Tk):
def __init__(self):
super().__init__()
self.btn = Button(self, text='Run', command=self.pb)
self.btn.grid(row=0,column=0)
self.finished = threading.Event() # event used to know if the process is finished
def pb(self):
def check_if_finished():
if self.finished.is_set():
# process is finished, destroy toplevel
window.destroy()
self.btn['state']='normal'
else:
self.after(1000, check_if_finished)
window = Toplevel(root)
window.progress = Progressbar(window, orient=HORIZONTAL,length=100, mode='indeterminate')
window.progress.grid(row=1,column=0)
window.progress.start()
self.btn['state']='disabled'
threading.Thread(target=self.dummyscript).start()
self.after(1000, check_if_finished) # check every second if the process is finished
def dummyscript(self):
self.finished.clear() # unset the event
time.sleep(10) # execute script
print("slept")
self.finished.set() # set the event
root = Main()
root.mainloop()
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