python开发_tkinter_获取单选菜单值

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下面是tkinter的获取单选菜单值的操作

运行效果：

当点击'print party and flavor'按钮的时候，获取单选菜单的值

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代码部分：

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 from tkinter import *

 #       The way to think about this is that each radio button menu
 #       controls a different variable -- clicking on one of the
 #       mutually exclusive choices in a radiobutton assigns some value
 #       to an application variable you provide. When you define a
 #       radiobutton menu choice, you have the option of specifying the
 #       name of a varaible and value to assign to that variable when
 #       that choice is selected. This clever mechanism relieves you,
 #       the programmer, from having to write a dumb callback that
 #       probably wouldn't have done anything more than an assignment
 #       anyway. The Tkinter options for this follow their Tk
 #       counterparts:
 #       {"variable" : my_flavor_variable, "value" : "strawberry"}
 #       where my_flavor_variable is an instance of one of the
 #       subclasses of Variable, provided in Tkinter.py (there is
 #       StringVar(), IntVar(), DoubleVar() and BooleanVar() to choose
 #       from)

 __author__ = {'name' : 'Hongten',
               'mail' : '[e-mail]',
               'blog' : 'http://www.cnblogs.com/',
               'QQ': '',
               'created' : '2013-09-11'}

 def makePoliticalParties(var):
     # make menu button
     Radiobutton_button = Menubutton(mBar, text='Political Party',
                                     underline=0)
     Radiobutton_button.pack(side=LEFT, padx='2m')

     # the primary pulldown
     Radiobutton_button.menu = Menu(Radiobutton_button)

     Radiobutton_button.menu.add_radiobutton(label='Republican',
                                             variable=var, value=1)

     Radiobutton_button.menu.add('radiobutton', {'label': 'Democrat',
                                                 'variable' : var,
                                                 'value' : 2})

     Radiobutton_button.menu.add('radiobutton', {'label': 'Libertarian',
                                                 'variable' : var,
                                                 'value' : 3})

     var.set(2)

     # set up a pointer from the file menubutton back to the file menu
     Radiobutton_button['menu'] = Radiobutton_button.menu

     return Radiobutton_button

 def makeFlavors(var):
     # make menu button
     Radiobutton_button = Menubutton(mBar, text='Flavors',
                                     underline=0)
     Radiobutton_button.pack(side=LEFT, padx='2m')

     # the primary pulldown
     Radiobutton_button.menu = Menu(Radiobutton_button)

     Radiobutton_button.menu.add_radiobutton(label='Strawberry',
                                             variable=var, value='Strawberry')

     Radiobutton_button.menu.add_radiobutton(label='Chocolate',
                                             variable=var, value='Chocolate')

     Radiobutton_button.menu.add_radiobutton(label='Rocky Road',
                                             variable=var, value='Rocky Road')

     # choose a default
     var.set("Chocolate")

     # set up a pointer from the file menubutton back to the file menu
     Radiobutton_button['menu'] = Radiobutton_button.menu

     return Radiobutton_button

 def printStuff():
     print("party is", party.get())
     print("flavor is", flavor.get())
     print()

 #################################################
 #### Main starts here ...
 root = Tk()

 # make a menu bar
 mBar = Frame(root, relief=RAISED, borderwidth=2)
 mBar.pack(fill=X)

 # make two application variables,
 # one to control each radio button set
 party = IntVar()
 flavor = StringVar()

 Radiobutton_button = makePoliticalParties(party)
 Radiobutton_button2 = makeFlavors(flavor)

 # finally, install the buttons in the menu bar.
 # This allows for scanning from one menubutton to the next.
 mBar.tk_menuBar(Radiobutton_button, Radiobutton_button2)

 b = Button(root, text="print party and flavor", foreground="red",
            command=printStuff)
 b.pack(side=TOP)

 root.title('menu demo')
 root.iconname('menu demo')

 root.mainloop()

参考资料：

http://www.oschina.net/code/explore/Python-3.1.3/Demo/tkinter/matt/two-radio-groups.py