In this exercise, we have a python script of Langton's ant that uses a 50 by 50 grid. This grid is saved in a list of lists containing a 0 for each black cell and a 1 for each white cell. This list of list is a variable called grid.

There is a button on the window meant to load a predefined grid.

The only missing thing is the coding of the "load" button. We want this button to read an existing text file named "grid_save.txt"containing the state of the grid as text.

For example, if the text file contains:

Here is the part of the code where the loading of the grid should be implemented:

new_file = open("grid_save.txt", "r")
if load == True:
    x = 0
    y = 0
    for line in new_file:
        line = line.strip(???)
        y = y + 1
        for character in line:
            grid[y][x] = ???
            x = x + 1
new_file.close()

Write the 2 missing pieces of code represented by ???. Seperate both line with a semi-colon ";".