如何在矩阵中用户想要的特定位置插入X？

import numpy as np

# 创建一个3x3的矩阵
matrix = np.zeros((3, 3))

# 用户想要在第2行、第3列插入X
row_index = 1
col_index = 2

# 确保矩阵维度足够
if row_index >= matrix.shape[0] or col_index >= matrix.shape[1]:
    # 扩展矩阵大小
    new_rows = max(row_index + 1, matrix.shape[0])
    new_cols = max(col_index + 1, matrix.shape[1])
    new_matrix = np.zeros((new_rows, new_cols))
    new_matrix[:matrix.shape[0], :matrix.shape[1]] = matrix
    matrix = new_matrix

# 在特定位置插入X
matrix[row_index, col_index] = 'X'

# 输出结果
print(matrix)