shorten code

simplify python to be shorter

import thinker cas tk

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

def$\_$ init$\_($self$,$ mastar $=$ None$)$:

super $().-$ init $\_($master$)$

self.master $=$master

# Set the frame's title

self.master.title $(\text{'}$An Empty Frame'$)$

self.pack$()$

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

# Set the frame's width $(400)$ and height $(250)$ in pixels.

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