实现部分还款处理更新未还余额

def solve():
    from pyodide.http import open_url
    clients_csv = open_url(____).read()
    loans_csv = open_url(____).read()
    loan_repayment_schedule_csv = open_url(____).read()
    loan_transactions_csv = open_url(____).read()
    loan_charges_csv = open_url(____).read()
    import sqlite3, pandas as pd
    from io import StringIO
    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    row = pd.read_sql_query(____).iloc[____]
    partial_payment = ____
    total_due = float(____)
    remaining = total_due - partial_payment
    print(____)
    print(____)
    print(____)
    print(____)
    print(____)
    conn.close()