[Discuss-gnuradio] how to use grc item's value in py

[nansai hu]

I generated a py file by GRC with a ratiobutton block.(ratiobutton have two button "Yes" & "No")

And now  I want to modify the py file to implement a if logic by that ratiobutton:

That means if user choose "Yes" then Print "XXXX", otherwise, Print "OOOO", So how and which value of ratiobutton block I should judge in py file?

 

Is anyone have this kind of experience before? or show me a example, thanks