find_diagonal_match.py

def find_diagonal_match(matrix, y, x, searchLeft=False):
    negator = -1 if searchLeft else 1
    match = True
    if len(matrix) < y+5 or (len(matrix[y]) < x+5 and x-5 > 0):
        match = False
    for i in range(1, 5):
        if not match:
            break
        newX = x + (negator*i)
        match = matrix[y+i][newX] == matrix[y][x]
    return match