First graphical interface (modified version)

from tkinter import Tk

#  Display window 
my_win = Tk()

#  title 
my_win.title('ceshi')

# Set size , And center 
width = 240
height = 500
scr_wid,scr_hei= my_win.maxsize()  #  The first is to get the size of the entire screen 
print(scr_hei,scr_wid)
dx = "%dx%d+%d+%d"%(width,height,(scr_wid-width)/2,(scr_hei-height)/2)
my_win.geometry(dx)

#  Set whether you can zoom 
my_win.resizable(width=True,height=False)

my_win.mainloop()