如何获取tkinter Spinbox的值？

huangapple
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英文:

How to get tkinter Spinbox's value?

问题

我正在尝试在Python Tkinter上创建一个计时器。为了设置计时器，我正在使用微调框（spinboxes）。但是，我在将我的微调框的值转换为变量time_h、time_m和time_s时遇到了问题。

我尝试使用.get()，但它不起作用。当我尝试打印这些变量时，我得到了NameError: name 'spin_h' is not defined。

  1. from tkinter import * 
  2. window = Tk()
  3. window.title("Timer")
  4. window.geometry('350x200')
  5. hour = 0
  6. minute = 0
  7. second = 0
  8. timer = (str(hour) + ':' + str(minute) + ':' + str(second))
  9. lbl = Label(window, text=timer, font=("Arial Bold", 50))
  10. hour_s = 0
  11. min_s = 0
  12. sec_s = 0
  13. def save_time():
  14.     time_h = spin_h.get()
  15.     time_m = spin_m.get()
  16.     time_s = spin_s.get()
  18. def new_window():
  19.     set_time = Tk()
  20.     spin_h = Spinbox(set_time, from_=0, to=10, width=5)
  21.     spin_h.grid(column=1,row=0)
  22.     spin_m = Spinbox(set_time, from_=0, to=60, width=5)
  23.     spin_m.grid(column=3,row=0)
  24.     spin_s = Spinbox(set_time, from_=0, to=60, width=5)
  25.     spin_s.grid(column=5,row=0)
  26.     h_label = Label(set_time, text='h', font=("Arial Bold", 10))
  27.     h_label.grid(column=2, row=0)
  28.     m_label = Label(set_time, text='m', font=("Arial Bold", 10))
  29.     m_label.grid(column=4, row=0)
  30.     s_label = Label(set_time, text='s', font=("Arial Bold", 10))
  31.     s_label.grid(column=6, row=0)
  32.     set_button = Button(set_time, text="Set Time", command=save_time)
  33.     set_button.grid(column=3, row=2)
  35. btn = Button(window, text="Set Time", command=new_window)
  36. btn.grid(column=3, row=2)
  37. lbl.grid(column=3, row=0)
  38. window.mainloop()
英文:

I am trying to make a timer on python Tkinter. To set the timer, I am using spinboxes. But, I am having trouble getting the value of my spinboxes to be turned into the variables time_h, time_m and time_s.

I have tried .get() but it is not working. When I tried printing the variables I got NameError: name 'spin_h' is not defined.

  1. from tkinter import * 
  2. window = Tk()
  3. window.title("Timer")
  4. window.geometry('350x200')
  5. hour = 0
  6. minute = 0
  7. second = 0
  8. timer = (str(hour) + ':' + str(minute) + ':' + str(second))
  9. lbl = Label(window, text=timer, font=("Arial Bold", 50))
  10. hour_s = 0
  11. min_s = 0
  12. sec_s = 0
  13. def save_time():
  14.     time_h = spin_h.get()
  15.     time_m = spin_m.get()
  16.     time_s = spin_s.get()
  18. def new_window():
  19.     set_time = Tk()
  20.     spin_h = Spinbox(set_time, from_=0, to=10, width=5)
  21.     spin_h.grid(column=1,row=0)
  22.     spin_m = Spinbox(set_time, from_=0, to=60, width=5)
  23.     spin_m.grid(column=3,row=0)
  24.     spin_s = Spinbox(set_time, from_=0, to=60, width=5)
  25.     spin_s.grid(column=5,row=0)
  26.     h_label = Label(set_time, text='h', font=("Arial Bold", 10))
  27.     h_label.grid(column=2, row=0)
  28.     m_label = Label(set_time, text='m', font=("Arial Bold", 10))
  29.     m_label.grid(column=4, row=0)
  30.     s_label = Label(set_time, text='s', font=("Arial Bold", 10))
  31.     s_label.grid(column=6, row=0)
  32.     set_button = Button(set_time, text="Set Time", command=save_time)
  33.     set_button.grid(column=3, row=2)
  37. btn = Button(window, text="Set Time", command=new_window)
  38. btn.grid(column=3, row=2)
  39. lbl.grid(column=3, row=0)
  40. window.mainloop()

答案1

得分: 0

spin_h是new_window()函数内部的局部变量，不能被save_time()函数访问。您可以在new_window()的开头将其声明为全局变量来解决此问题。- #Martineau（将其从评论改成了答案）。

谢谢Martineau。

英文:

spin_h is a variable local to the new_window() function and there cannot be accessed by the save_time() function. You could declare it a global variable at the beginning of new_window() to fix that. - #Martineau (just made it into an answer instead of a comment).

Thanks Martineau

huangapple
  • 本文由 发表于 2020年1月7日 02:10:58
  • 转载请务必保留本文链接：https://go.coder-hub.com/59616913.html
  • python
  • tkinter
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