def reverse_cols_lr(matrix):
    """ Flip order of the columns in the matrix[row][col]
    
    Using numpy only fits matrix lists with numbers:

        np_matrix = np.array(matrix)
        return np_matrix.fliplr().tolist()
    
    To suit any list element type use general fliplr.
    """
    result = []
    for row in matrix:
        result.append(list(reversed(row)))
    return result