如何按一定的顺序打印出二维数组？

def printMatrix(matrix):
    if not matrix:
        return []
    
    rows = len(matrix)
    cols = len(matrix[0])
    top, bottom, left, right = 0, rows - 1, 0, cols - 1
    result = []
    
    while top <= bottom and left <= right:
        # 打印上边界
        for i in range(left, right + 1):
            result.append(matrix[top][i])
        top += 1
        
        # 打印右边界
        for i in range(top, bottom + 1):
            result.append(matrix[i][right])
        right -= 1
        
        # 打印下边界
        if top <= bottom:
            for i in range(right, left - 1, -1):
                result.append(matrix[bottom][i])
            bottom -= 1
        
        # 打印左边界
        if left <= right:
            for i in range(bottom, top - 1, -1):
                result.append(matrix[i][left])
            left += 1
    
    return result