script/format_trans/sharegpt2chatml.py

import json

INPUT_PATH = "/root/test/weitiao/data_process_bq/data3/result/M_sharegpt_data3_all_order_perfect_neutral_fade.json"
OUTPUT_PATH = "/root/test/weitiao/data_process_bq/data3/result/M_chatml_data3_all_order_perfect_neutral_fade.json"

def convert_one_sample(sample):
    messages = []

    for msg in sample.get("conversations", []):
        role_map = {
            "system": "system",
            "human": "user",
            "gpt": "assistant"
        }

        from_role = msg.get("from")
        if from_role not in role_map:
            continue

        messages.append({
            "role": role_map[from_role],
            "content": msg.get("value", "")
        })

    def convert_choice(choice):
        if not choice:
            return []
        return [{
            "role": "assistant",
            "content": choice.get("value", "")
        }]

    return {
        "messages": messages,
        "chosen": convert_choice(sample.get("chosen")),
        "rejected": convert_choice(sample.get("rejected"))
    }


def main():
    with open(INPUT_PATH, "r", encoding="utf-8") as f:
        data = json.load(f)

    assert isinstance(data, list), "输入 JSON 顶层必须是 list"

    converted = []
    for idx, sample in enumerate(data):
        try:
            converted.append(convert_one_sample(sample))
        except Exception as e:
            print(f"[WARN] 第 {idx} 条样本转换失败: {e}")

    with open(OUTPUT_PATH, "w", encoding="utf-8") as f:
        json.dump(converted, f, ensure_ascii=False, indent=2)

    print(f"反向转换完成，共 {len(converted)} 条")
    print(f"输出路径：{OUTPUT_PATH}")


if __name__ == "__main__":
    main()