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中级

实现退款处理原路返回

未完成
中级参考 代码结构已给出，请填写 ____ 处 
def solve():
    from pyodide.http import open_url
    account_types_csv = open_url(____).read()
    payment_channels_csv = open_url(____).read()
    accounts_csv = open_url(____).read()
    transfers_csv = open_url(____).read()
    disputes_csv = open_url(____).read()
    import sqlite3, pandas as pd, json
    from io import StringIO
    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    tx = pd.read_sql_query(____).iloc[____]
    refund = {"____": f"____", "____": int(____),
              "____": int(____), "____": float(____),
              "____": "____", "____": f"____"}
    print(json.dumps(____))
    conn.close()

示例

输入
solve()
期望输出
{"transfer_no": "REF_TXN202606030002", "from_account_id": 5, "to_account_id": 3, "amount": 10000.0, "status": "REFUND", "remark": "退款-TXN202606030002"}
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