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查询某贷款账户的完整还款历史

未完成
初级参考 完整示例代码供参考，建议自己理解后重新输入 
def solve():
    from pyodide.http import open_url
    clients_csv = open_url("https://data.zuihe.com/dbd/credit/state_03/clients.csv").read()
    loans_csv = open_url("https://data.zuihe.com/dbd/credit/state_03/loans.csv").read()
    loan_repayment_schedule_csv = open_url("https://data.zuihe.com/dbd/credit/state_03/loan_repayment_schedule.csv").read()
    loan_transactions_csv = open_url("https://data.zuihe.com/dbd/credit/state_03/loan_transactions.csv").read()
    loan_charges_csv = open_url("https://data.zuihe.com/dbd/credit/state_03/loan_charges.csv").read()
    import sqlite3, pandas as pd
    from io import StringIO
    conn = sqlite3.connect(':memory:')
    pd.read_csv(StringIO(loan_transactions_csv)).to_sql('loan_transactions', conn, index=False, if_exists='replace')
    result = pd.read_sql_query("SELECT tx_date, amount, principal_portion, interest_portion, reference FROM loan_transactions WHERE loan_id=1 AND tx_type='REPAYMENT' ORDER BY tx_date", conn)
    print(result.to_string(index=False))
    conn.close()

示例

输入
solve()
期望输出
tx_date  amount  principal_portion  interest_portion   reference
2026-03-31    4342               3800               542 REP20260301
2026-04-30    4342               3821               521 REP20260401
2026-05-31    4342               3842               500 REP20260501
2026-06-30    4342               3863               479 REP20260601
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