实现承诺还款日管理客户承诺PTP

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_charges_csv = open_url(____).read()
    import sqlite3, pandas as pd
    from io import StringIO
    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    loan = pd.read_sql_query(____).iloc[____]
    promise_date = '____'
    promise_amount = ____
    days = int(____)
    in_m1 = days <= ____
    print(____)
    print(____)
    print(____)
    print(____)
    print(____)
    conn.close()