实现到期自动续存：计算新到期日

def solve():
    from pyodide.http import open_url
    offices_csv = open_url(____).read()
    staff_csv = open_url(____).read()
    savings_products_csv = open_url(____).read()
    clients_csv = open_url(____).read()
    savings_accounts_csv = open_url(____).read()
    savings_account_transactions_csv = open_url(____).read()
    gl_accounts_csv = open_url(____).read()
    journal_entries_csv = open_url(____).read()
    import sqlite3, pandas as pd
    from io import StringIO
    from datetime import date
    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    pd.read_csv(StringIO(____)).to_sql(____)
    account_id = ____
    acc = conn.execute("____""____""____", (____)).fetchone()
    from calendar import monthrange
    old = date.fromisoformat(____)
    m = old.month + acc[____]
    y = old.year + (____)//____
    m = (____)%____+____
    d = min(old.day, monthrange(____)[____])
    new_maturity = date(____)
    conn.execute('____', (str(____), account_id))
    conn.commit()
    print({'____': acc[____], '____': acc[____], '____': str(____), '____': '____'})
    conn.close()