将字符串提取为二维数组？

# 示例字符串
string = "1,2,3\n4,5,6\n7,8,9"

# 将字符串按行分割
rows = string.split("\n")

# 初始化二维数组
array = []

# 遍历每一行
for row in rows:
    # 将每一行按逗号分割
    cols = row.split(",")
    # 将每一行的列添加到二维数组中
    array.append(cols)

# 输出二维数组
print(array)

[['1', '2', '3'], ['4', '5', '6'], ['7', '8', '9']]