验证优惠券有效性

def solve():
    from pyodide.http import open_url
    users_csv = open_url(____).read()
    categories_csv = open_url(____).read()
    products_csv = open_url(____).read()
    orders_csv = open_url(____).read()
    order_items_csv = open_url(____).read()
    reviews_csv = open_url(____).read()
    coupons_csv = open_url(____).read()
    import sqlite3
    import pandas as pd
    from io import StringIO
    from datetime import datetime

    conn = sqlite3.connect(____)
    pd.read_csv(StringIO(____)).to_sql(____)

    ORDER_AMOUNT = ____
    CHECK_TIME = datetime.strptime(____)

    def validate_coupon(____):
        exp = datetime.strptime(____)
        if exp < CHECK_TIME:
            return False, '____'
        if ORDER_AMOUNT < min_amount:
            return False, f'____'
        return True, '____'

    coupons = pd.read_sql_query(____)
    for _, row in coupons.iterrows():
        valid, reason = validate_coupon(____)
        print(____)
    conn.close()