实现抵押品重估更新评估价值重算覆盖率

def solve():
    from pyodide.http import open_url
    clients_csv = open_url(____).read()
    loans_csv = open_url(____).read()
    collaterals_csv = open_url(____).read()
    guarantors_csv = open_url(____).read()
    collateral_valuations_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(____)
    old_val = pd.read_sql_query(____).iloc[____]['____']
    new_val = pd.read_sql_query(____).iloc[____]['____']
    loan_balance = ____
    change_pct = round((____) / old_val * ____, ____)
    new_coverage = round(____)
    print(____)
    print(____)
    print(____)
    print(____)
    print(____)
    conn.close()