import thinker cs tk

class Application $($Hk$.$ Frame$)$:

def$\_\_$init$\_\_($salf$,$ master $=$ None$)$: super$().-$ init$\_($master$)$ self,master $=$master

# set the frame's title self.master.title $(\text{'}$An Empty Frame'$)$ self.pack$()$

app$-$frame $=**k*Tk()$

# Set the frame's width $(400)$ and height $(250)$ in pix app$-$frame.geomerty $(\text{'}400{250}^{\text{'}})$

# Make the frame visible to the user app $=$ Application $($master $=$ app$\_$frame$)$ app.mainloop$()$