使用 Tkinter 在特定时间打印值 [英] Print values at specific time with Tkinter

问题描述

我编写了一个基于命令的程序，它运行正常.由于我想添加一些图形界面，所以我用 Tkinter 准备了一个简单的界面.但是包含scheduler.run"的那一行，它锁定了我的应用程序，我无法得到任何错误代码.

I've written a command-base program and it works properly. Since I'd like to add some graphical interface, I prepared a simple one with Tkinter. But the line which contains "scheduler.run", it locks my application and I can't get any error code.

def do_deneme(p):
    etiket_run1["text"] = etiket_run1["text"] + str(p) + " completed at " + str(datetime.datetime.now())

def run_do():
    ...
    scheduler=sched.scheduler(time.time, time.sleep)
    for p in clean_information:
        scheduler.enter(float(p[12]), 1, do_deneme,(p,))
    etiket_run1["text"] = etiket_run1["text"] + str(datetime.datetime.now())
    scheduler.run()
    etiket_run1["text"] = etiket_run1["text"] + "Completed."

...
etiket_run1=Label(cerceve1, fg="red")
etiket_run1.pack(side=BOTTOM,padx=5,pady=5)
dugme = Button(cerceve2,text=u"Start",command=run_do)
...

有没有办法调试这个代码部分?或者任何关于在 Tkinter 中使用带有标签的 scheduler.run 的建议?

Any way to debug this code part? or any suggestion about using scheduler.run with labels in Tkinter?

推荐答案

Tkinter 是单线程的.看起来您的调度程序在运行某些东西之前一直处于休眠状态，因此当它处于休眠状态时，您的 GUI 将锁定.

Tkinter is single-threaded. It appears that your scheduler sleeps until it is time to run something, so while it is sleeping your GUI will lock up.

使用 Tkinter 在未来或按计划运行某事的正确方法是调用 after，它使用事件循环来安排某事在设定的时间后运行.如果您希望某事在固定的毫秒数后运行，您可以调用它一次，或者您可以重复调用它直到某个条件.重复，我的意思是你使用 after 来调用一个检查条件的函数；如果条件为假，函数将使用 after 再次调用自身.如果条件为真，它将运行您的作业.

The proper way to run something in the future or on a schedule with Tkinter is to call after which uses the event loop to schedule something to run after a set amount of time. You can either call it once if you want something to run a fixed number of milliseconds later, or you can repeatedly call it until some condition. By repeated, I mean you use after to call a function which checks the condition; if the condition is false the function will call itself again with after. If the condition is true, it runs your job.

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