如何合并多个PDB文件？

import os

def merge_pdb_files(input_files, output_file):
    # 初始化合并后的PDB文件内容
    merged_pdb = ""

    # 遍历每个输入文件
    for input_file in input_files:
        # 读取输入文件内容
        with open(input_file, "r") as f:
            pdb_content = f.read()

        # 将输入文件内容添加到合并后的PDB文件内容中
        merged_pdb += pdb_content

    # 将合并后的PDB文件内容写入输出文件
    with open(output_file, "w") as f:
        f.write(merged_pdb)

# 使用示例
input_files = ["file1.pdb", "file2.pdb", "file3.pdb"]
output_file = "merged.pdb"
merge_pdb_files(input_files, output_file)