Question

我正在尝试创建一个计时器来关闭运行Linux的计算机。要选择我使用Spinbox的时间。因此，想法是在微调框中选择时间量，然后将其添加到命令sudo shutdown -P + 15分钟（例如示例）。

到目前为止，它只是关闭了，我无法通过简单的方法来做到这一点。

from tkinter import *
import os
import time

def shutdown():
    hrs = spin1.get()
    command1 = ('sudo shutdown -P')
    #sum1 = command1 + hrs
    os.system('sudo shutdown -P') + ('hrs')
    print(os.system)

def cancel():
    command = ('sudo shutdown -c')
    os.system('sudo shutdown -c')
    print(command)



'''def hrs():
    spn1 = spin1.get()
    dsp1 = spn1
    lbltime ['text'] = dsp1'''

entry_width = 2
win = Tk()

spin1 = IntVar()
spn = IntVar()

win.title('SHUTDOWN')
win.geometry('300x250+300+150')
lbl = Label(win, text='SET YOUR SHUTDOWN')
lbl.place(x=80, y=30)


spin1 = Spinbox(win, from_=00, to=23, font=('arial',26,'bold'), width= entry_width, textvariable=spin1)
spin1.insert(0, '00')
spin1.place(x=130, y=60)

setup = Button(win, text='SET TIMER', font=('arial',16,'bold'), command=lambda :shutdown())
setup.place(x=90, y=130)

cnc = Button(win, text='CANCEL', font=('verdana',10, 'bold'),command= lambda :cancel())
cnc.place(x=120, y=180)

win.mainloop()

Answer 1

要将hrs（用户选择的分钟数）添加到命令中，您可以使用+或使用format()将其简单地添加到现有的字符串命令中显示在我的解决方案中。同样，当使用sudo运行命令时，您需要输入密码，要自动执行此操作，您可以使用-S参数，这会使sudo从STDIN（这里为"mypassword"）读取密码。

def shutdown():
    hrs = spin1.get()
    sd_command = 'echo mypassword | sudo -S shutdown -P +' + hrs # both will work
    sd_command = 'echo mypassword | sudo -S shutdown -P +{}'.format(hrs)
    os.system(command)
    print(command)

def cancel():
    cancel_command = 'echo mypassword | sudo -S shutdown -c'
    os.system(cancel_command)
    print(cancel_command)

如果要添加有关关机计划的消息，则需要添加另一个标签，此处shutdown_schedule将显示var_schedule的内容，该内容是tkinter字符串变量，将在用户计划或更改时进行修改取消关机。

def shutdown():
    hrs = spin1.get()

    sd_time = time.strftime("%H:%M", time.localtime(time.time() + 60*int(hrs)))
    var_schedule.set('Shutdown scheduled for {}'.format(sd_time))

    sd_command = 'echo mypassword | sudo -S shutdown -P +' + hrs # both will work
    sd_command = 'echo mypassword | sudo -S shutdown -P +{}'.format(hrs)
    os.system(command)
    print(command)

def cancel():
    var_schedule.set('Shutdown not scheduled yet')

    cancel_command = 'echo mypassword | sudo -S shutdown -c'
       os.system(cancel_command)
    print(cancel_command)

var_schedule = StringVar()
var_schedule.set('Shutdown not scheduled yet')

shutdown_schedule = Label(win, textvariable=var_schedule)
shutdown_schedule.place(x=130, y=30)

如何使用Tkinter制作计时器？

1 个答案: