我正在编写一个带有起始页面的程序，以及从该起始页面调用的两个程序。这两个子程序都是自己工作的。但是，当我将它们放入我的起始页时，秒表计时标签不会显示。如果你想知道，我把它们放进我的程序中：
import program
program.function()
这是我的首页程序：
from Tkinter import *
class start_page:
def __init__(self,master):
self.master = master
self.frame = Frame(self.master)
self.countdown = Button(master, text = "Timer", command = self.c).pack()
self.stopwatch_butt = Button(master,text="Stopwatch",command=self.g).pack()
def g(self):
import stopwatch
stopwatch.f()
def c(self):
import timer_prog
timer_prog.timer()
self.master.after_cancel(timer_prog)
def main():
root = Tk()
s = start_page(root)
root.title("Timer Suite: Brian Ton")
root.mainloop()
main()
如果我运行此程序，计时器程序工作正常，但秒表不会显示其标签，只显示其按钮。我试图在功能之后清除所有Tk，但这不起作用，我也尝试先运行秒表程序，但无济于事。
这是我的秒表计划：
from Tkinter import *
import datetime
def s():
start.config(state='disabled')
stop.config(state="normal")
reset.config(state='disabled')
Start()
def Start():
if reset['state'] == 'disabled' and stop['state'] == 'normal':
hidden.set(str(int(hidden.get())+1))
root.update()
root.after(1000,Start)
curr = hidden.get()
g.set(str(datetime.timedelta(seconds=int(curr))))
print g.get()
else:
return None
def Stop():
start.config(state='disabled')
stop.config(state='disabled')
reset.config(state="normal")
def Reset():
start.config(state="normal")
stop.config(state="disabled")
reset.config(state='disabled')
hidden.set('0')
g.set(str(datetime.timedelta(seconds=0)))
def f():
global root,frame,master,hidden,g,timelabel,start,stop,reset
root = Tk()
frame = Frame(root)
master = root
hidden = StringVar()
g = StringVar()
hidden.set('0')
timelabel = Label(master,textvariable=g)
g.set(str(datetime.timedelta(seconds=int(0))))
timelabel.grid(row=1,column=2)
start = Button(master,text="Start",command = s,state="normal")
stop = Button(master,text="Stop",command = Stop,state = "disabled")
reset = Button(master,text="Reset",command = Reset,state = "disabled")
start.grid(row=2,column=1)
stop.grid(row=2,column=2)
reset.grid(row=2,column=3)
root.update()
root.mainloop()
这是我的计时器程序：
from Tkinter import *
import datetime
def get_seconds(h,m,s):
hr_sec = h * 3600
m_sec = m * 60
return hr_sec+m_sec+s
def timerstartstop():
hours = hour_entry.get()
minutes = minute_entry.get()
sec = second_entry.get()
if hours == "":
hours = 0
hour_entry.insert(0,"0")
if minutes == "":
minutes = 0
minute_entry.insert(0,"0")
if sec == "":
sec = 0
second_entry.insert(0,"0")
c = get_seconds(int(hours), int(minutes), int(sec))
global s
s = StringVar(master)
s.set(c)
if startstop['text'] == 'Stop':
global curr
curr = shown
s.set(-1)
if startstop['text'] == 'Reset':
startstop.config(text="Start")
s.set(c)
root.update()
shown.set(str(datetime.timedelta(seconds=int(s.get()))))
return None
countdown()
import winsound
def countdown():
startstop.config(text="Stop")
global shown
good = True
shown = StringVar(master)
shown.set(str(datetime.timedelta(seconds=int(s.get()))))
L = Label(master,textvariable=shown).grid(row=1,column=2)
if int(s.get()) == 0:
startstop.config(text="Reset")
while startstop['text'] != "Start":
root.update()
winsound.Beep(500,500)
elif int(s.get()) < 0:
good = False
shown.set(curr.get())
startstop.config(text="Reset")
else:
if good:
s.set(str(int(s.get())-1))
root.after(1000,countdown)
def ex():
root.after_cancel(countdown)
root.destroy()
def timer():
global root
global master
global frame
root = Tk()
master = root
frame = Frame(master)
global hour_entry
hour_entry = Entry(master,width=3)
hour_entry.grid(row=0,column=0)
colon_l = Label(master,text=':').grid(row=0,column=1)
global minute_entry
minute_entry = Entry(master,width=2)
minute_entry.grid(row=0,column=2)
colon_l2 = Label(master,text=':').grid(row=0,column=3)
global second_entry
second_entry = Entry(master,width=2)
second_entry.grid(row=0,column=4)
global startstop
startstop = Button(master,text="Start",command=timerstartstop)
e = Button(master,text="Exit",command=ex).grid(row=1,column=3)
startstop.grid(row=0,column=5)
root.mainloop()
此外，我尝试从使用控制台的不同开始菜单运行这两个程序，这是有效的。
控制台程序是：
import timer_prog
timer_prog.timer()
raw_input('next')
import stopwatch
stopwatch.f()
附上一些截图，显示秒表程序应该与起始程序调用时的外观相比。
注意：我可以告诉程序从起始页面运行，因为它每秒打印当前时间。另外，我附上了一些截图
Stopwatch Program Run Directly
Stopwatch Program Run From The Start Page
答案 0 :(得分：1)
Tkinter程序应该只使用一个Tk() - 创建主窗口 - 和一个mainloop() - 来控制所有窗口和窗口小部件。如果您使用两个Tk()和两个mainloop()，那么它就会出现问题 - 例如get()/set()可能无效。
子窗口应使用Toplevel()而不是Tk()。
启动程序的函数（即run()）可以使用参数window（def run(window)）运行，然后您可以将其作为独立程序执行
root = Tk()
run(root)
root.mainloop()
或导入后
run(Toplevel())
（不含maniloop()）
您可以使用if __name__ == "__main__"来识别程序是否以独立方式启动。
实施例
<强> main.py
from Tkinter import *
class StartPage:
def __init__(self, master):
self.master = master
master.title("Timer Suite: Brian Ton")
Button(master, text="Timer", command=self.run_timer).pack()
Button(master, text="Stopwatch", command=self.run_stopwatch).pack()
def run_stopwatch(self):
import stopwatch
window = Toplevel()
stopwatch.run(window)
def run_timer(self):
import timer_prog
window = Toplevel()
timer_prog.timer(window)
self.master.after_cancel(timer_prog)
def main():
root = Tk()
StartPage(root)
root.mainloop()
main()
<强> stopwatch.py
from Tkinter import *
import datetime
def pre_start():
start_button.config(state='disabled')
stop_button.config(state='normal')
reset_button.config(state='disabled')
start()
def start():
global current_time
# stop_button['state'] can be 'normal' or 'active' so better use ` != 'disabled'`
if reset_button['state'] == 'disabled' and stop_button['state'] != 'disabled':
current_time += 1
time_var.set(str(datetime.timedelta(seconds=current_time)))
print(time_var.get())
master.after(1000, start)
def stop():
start_button.config(state='disabled')
stop_button.config(state='disabled')
reset_button.config(state='normal')
def reset():
global current_time
start_button.config(state='normal')
stop_button.config(state='disabled')
reset_button.config(state='disabled')
current_time = 0
time_var.set(str(datetime.timedelta(seconds=0)))
def run(window):
global master
global current_time, time_var
global start_button, stop_button, reset_button
master = window
current_time = 0
time_var = StringVar()
time_var.set(str(datetime.timedelta(seconds=0)))
time_label = Label(window, textvariable=time_var)
time_label.grid(row=1, column=2)
start_button = Button(master, text='Start', command=pre_start, state='normal')
stop_button = Button(master, text='Stop', command=stop, state='disabled')
reset_button = Button(master, text='Reset', command=reset, state='disabled')
start_button.grid(row=2, column=1)
stop_button.grid(row=2, column=2)
reset_button.grid(row=2, column=3)
if __name__ == '__main__':
# it runs only in standalone program
root = Tk()
run(root)
root.mainloop()