如何从目录中读取多个文件并转换为矩阵

import os
import numpy as np

# 目录路径
directory = '/path/to/directory'

# 遍历目录中的文件
for filename in os.listdir(directory):
    filepath = os.path.join(directory, filename)
    
    # 判断文件类型和格式
    if filename.endswith('.txt'):
        # 读取文本文件内容
        with open(filepath, 'r') as file:
            content = file.readlines()
        
        # 转换为矩阵
        matrix = np.array([list(map(int, line.strip().split())) for line in content])
        
        # 合并矩阵
        if 'merged_matrix' not in locals():
            merged_matrix = matrix
        else:
            merged_matrix = np.concatenate((merged_matrix, matrix), axis=0)

# 打印合并后的矩阵
print(merged_matrix)