view a text file (map) in high resolution

def display_map(fname):
    """
    view a text file (map) in high resolution
    """
    print("viewing ", fname)
    
    wrld = read_map(fname)
    for row in wrld:
        #for col in row:
        print(row)
    app = gui_view_tk(None)
    app.add_file(fname)
    app.show_grid_from_file(fname)
    app.title('Map View')
    app.mainloop()