Python3 tkinter Basic Menu Click on one of the items in the drop-down menu before the tick appears (can not be selected) Add_radiobutton

Town Field Poem:
The Pure Heart sentiment wisdom language, does not have the world name and the benefit. Learn water under the hundred rivers, give up arrogant slow meaning.
Learn to have a small return to feed root, willing to cast a conscience blog. Sincere in this writing experience, willing to see the text to inspire.
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Code

From Tkinter import *root=tk () Menubar=menu (root) Userchoice=intvar () Userchoice.set (1) #OFFICEOpen默认选中fileMenu =menu ( Menubar,tearoff=false) Menubar.add_cascade (label= ' File ', Menu=filemenu) Filemenu.add_radiobutton (label= ' Officeopen ', variable=userchoice,value=1) Filemenu.add_radiobutton (label= ' Wpsopen ', variable=userchoice,value=2) Root.config (Menu=menubar) Mainloop ()

Result

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The essence of the blog, in the technical part, more in the town yard a poem. Python version 3.5, System Windows7.
Python is a good language and deserves to be studied hard. I am following the small Turtle Video tutorial to learn, recommended.
I am a novice, so if the content of the blog can be improved, or even the wrong place, please leave a comment, I will try to correct, strive to achieve a conscience blog.
Note: This article is only as a scientific research study, if I inadvertently violated your rights and interests, please be sure to timely inform, I will make corrections.

Python3 tkinter Basic Menu Click on one of the items in the drop-down menu before the tick appears (can not be selected) Add_radiobutton