如何过滤选中的偶数列？

def filter_even_columns(data):
    filtered_data = []
    for row in data:
        filtered_row = []
        for i, value in enumerate(row):
            if i % 2 == 0:  # 判断列索引是否为偶数
                filtered_row.append(value)
        filtered_data.append(filtered_row)
    return filtered_data

# 示例数据集合
data = [
    [1, 2, 3, 4, 5, 6],
    [7, 8, 9, 10, 11, 12],
    [13, 14, 15, 16, 17, 18]
]

filtered_data = filter_even_columns(data)
print(filtered_data)

[[1, 3, 5], [7, 9, 11], [13, 15, 17]]