Python Spiral Matrix Traversal

def spiral_order(matrix):
    if not matrix:
        return []
        
    result = []
    top, bottom = 0, len(matrix) - 1
    left, right = 0, len(matrix[0]) - 1
    
    while top <= bottom and left <= right:
        # Traverse Right
        for col in range(left, right + 1):
            result.append(matrix[top][col])
        top += 1
        
        # Traverse Down
        for row in range(top, bottom + 1):
            result.append(matrix[row][right])
        right -= 1
        
        if top <= bottom:
            # Traverse Left
            for col in range(right, left - 1, -1):
                result.append(matrix[bottom][col])
            bottom -= 1
            
        if left <= right:
            # Traverse Up
            for row in range(bottom, top - 1, -1):
                result.append(matrix[row][left])
            left += 1
            
    return result

grid = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
]
print("Matrix Spiral Order:")
print(spiral_order(grid))

Matrix Spiral Order:
[1, 2, 3, 6, 9, 8, 7, 4, 5]