##### The exercice is validated is all questions of the exercice are validated

##### The question 1 is validated if the output is the same as:
`np.ones([9,9], dtype=np.int8)`

##### The question 2 is validated if the output is

    ```console
    array([[1, 1, 1, 1, 1, 1, 1, 1, 1],
        [1, 0, 0, 0, 0, 0, 0, 0, 1],
        [1, 0, 1, 1, 1, 1, 1, 0, 1],
        [1, 0, 1, 0, 0, 0, 1, 0, 1],
        [1, 0, 1, 0, 1, 0, 1, 0, 1],
        [1, 0, 1, 0, 0, 0, 1, 0, 1],
        [1, 0, 1, 1, 1, 1, 1, 0, 1],
        [1, 0, 0, 0, 0, 0, 0, 0, 1],
        [1, 1, 1, 1, 1, 1, 1, 1, 1]], dtype=int8)
    ```

##### The solution of question 2 is not accepted if the values of the array have been changed one by one manually. The usage of the for loop is not allowed neither.
    Here is an example of a possible solution:

    ```console
        x[1:8,1:8] = 0 
        x[2:7,2:7] = 1 
        x[3:6,3:6] = 0 
        x[4,4] = 1 
    ```