new_contents: from Tkinter import *
  
  # Creating the window for the calculator
  window = Tk()
  # Creating the canvas
  canvas = Canvas(window, width = 515, height = 515)
  # Organizes widgets in a table-like structure in the parent widget.
  canvas.grid(row = 4, column = 4)
  # Bring the application up to date by invoking idel callbacks
  canvas.update_idletasks()
  # Set title
  window.title("Calculator")
  # Avoid resizing the window
  window.resizable(width = False, height = False)
  #calc = calculator()
  
  calc_input = Entry(canvas, width = 30, justify = RIGHT)
  calc_input.pack()
  
subject: Create gui_calculator.py