如何序列化和反序列化2D矩阵？

# 序列化2D矩阵
def serialize(matrix):
    serialized = ""
    for row in matrix:
        serialized += ",".join(str(num) for num in row) + ";"
    return serialized

# 反序列化2D矩阵
def deserialize(serialized):
    rows = serialized.split(";")
    matrix = []
    for row in rows:
        matrix.append([int(num) for num in row.split(",")])
    return matrix

# 示例矩阵
matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

# 序列化矩阵
serialized_matrix = serialize(matrix)
print("Serialized matrix:", serialized_matrix)

# 反序列化矩阵
deserialized_matrix = deserialize(serialized_matrix)
print("Deserialized matrix:", deserialized_matrix)

Serialized matrix: 1,2,3;4,5,6;7,8,9;
Deserialized matrix: [[1, 2, 3], [4, 5, 6], [7, 8, 9]]