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依次读取三个TOML文件并合并，后续文件覆盖之前的值，最终将结果写入新文件

import toml

def deep_update(base_dict, update_dict):
    """
    递归合并字典，后续字典的值覆盖前者[6]
    """
    for key, val in update_dict.items():
        if isinstance(val, dict):
            if key in base_dict and isinstance(base_dict[key], dict):
                deep_update(base_dict[key], val)
            else:
                base_dict[key] = val.copy()
        else:
            base_dict[key] = val
    return base_dict

def merge_toml_files(file_paths, output_path):
    merged = {}
    for path in file_paths:
        with open(path, "r", encoding="utf-8") as f:
            current = toml.load(f)  # 读取TOML文件[2,7]
            deep_update(merged, current)
    
    with open(output_path, "w", encoding="utf-8") as f:
        toml.dump(merged, f)  # 写入合并后的配置[3,6]

if __name__ == "__main__":
    input_files = ["file1.toml", "file2.toml", "file3.toml"]
    output_file = "merged.toml"
    merge_toml_files(input_files, output_file)