script/format_trans/chatml2sharegpt.py

import json
from pathlib import Path

# ===== 路径配置 =====
INPUT_PATH = "/root/test/weitiao/data_process_bq/data/train01_chatml_closed_length2048turns20_replaced.json"
OUTPUT_PATH = "/root/test/weitiao/data_process_bq/data/train01_sharegpt_closed_length_replaced.json"


def convert_one_sample(sample):
    conversations = []

    for msg in sample.get("messages", []):
        role = msg.get("role")
        content = msg.get("content", "")

        if role == "user":
            conversations.append({
                "from": "human",
                "value": content
            })
        elif role == "assistant":
            conversations.append({
                "from": "gpt",
                "value": content
            })

        elif role == "system":
            conversations.append({
                "from": "system",
                "value": content
            })

    def convert_choice(choice_list):
        if not choice_list:
            return None
        choice = choice_list[0]
        return {
            "from": "gpt",
            "value": choice.get("content", "")
        }

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


if __name__ == "__main__":
    main()