Tkinter：如何创建选择框

I need to create a choice box

where i can click on arrow and it give me list of choices.

And if i click on one of them it will change it in that first rectangle.
Its possible to do something like this? Thank you for any idea.

您还可以尝试OptionMenu http://effbot.org/tkinterbook/optionmenu.htm:

from Tkinter import *

root = Tk()

choices = ['GB', 'MB', 'KB']
variable = StringVar(root)
variable.set('GB')

w = OptionMenu(root, variable, *choices)
w.pack(); root.mainloop()

或者您可以尝试使用Combobox:

from ttk import *
from Tkinter import *

root = Tk()

choices = ['GB', 'MB', 'KB']
variable = StringVar(root)
variable.set('GB')

w = Combobox(root, values = choices)
w.pack(); root.mainloop()