How to use the akshare.futures.cons.zh_match_main_contract_payload function in akshare

def match_main_contract(exchange="dce"):
    subscribe_cffex_list = []
    exchange_symbol_list = zh_subscribe_exchange_symbol(
        exchange).iloc[:, 1].tolist()
    for item in exchange_symbol_list:
        zh_match_main_contract_payload.update({"node": item})
        res = requests.get(
            zh_match_main_contract_url,
            params=zh_match_main_contract_payload)
        data_json = demjson.decode(res.text)
        data_df = pd.DataFrame(data_json)
        try:
            main_contract = data_df[data_df.iloc[:, 3:].duplicated()]
            print(main_contract["symbol"].values[0])
            subscribe_cffex_list.append(main_contract["symbol"].values[0])
        except:
            print(item, "无主力合约")
            continue
    print("主力合约获取成功")
    return ','.join(["nf_" + item for item in subscribe_cffex_list])

def match_main_contract(exchange="dce"):
    subscribe_cffex_list = []
    exchange_symbol_list = zh_subscribe_exchange_symbol(exchange).iloc[:, 1].tolist()
    for item in exchange_symbol_list:
        zh_match_main_contract_payload.update({"node": item})
        res = requests.get(
            zh_match_main_contract_url, params=zh_match_main_contract_payload
        )
        data_json = demjson.decode(res.text)
        data_df = pd.DataFrame(data_json)
        try:
            main_contract = data_df.iloc[0, :3]
            subscribe_cffex_list.append(main_contract)
        except:
            print(item, "无主力连续合约")
            continue
    print("主力连续合约获取成功")
    return pd.DataFrame(subscribe_cffex_list)

def match_main_contract(exchange="dce"):
    subscribe_cffex_list = []
    exchange_symbol_list = zh_subscribe_exchange_symbol(
        exchange).iloc[:, 1].tolist()
    for item in exchange_symbol_list:
        zh_match_main_contract_payload.update({"node": item})
        res = requests.get(
            zh_match_main_contract_url,
            params=zh_match_main_contract_payload)
        data_json = demjson.decode(res.text)
        data_df = pd.DataFrame(data_json)
        try:
            main_contract = data_df[data_df.iloc[:, 3:].duplicated()]
            print(main_contract["symbol"].values[0])
            subscribe_cffex_list.append(main_contract["symbol"].values[0])
        except:
            print(item, "无主力合约")
            continue
    print("主力合约获取成功")
    return ','.join(["nf_" + item for item in subscribe_cffex_list])

def match_main_contract(exchange="dce"):
    subscribe_cffex_list = []
    exchange_symbol_list = zh_subscribe_exchange_symbol(exchange).iloc[:, 1].tolist()
    for item in exchange_symbol_list:
        zh_match_main_contract_payload.update({"node": item})
        res = requests.get(
            zh_match_main_contract_url, params=zh_match_main_contract_payload
        )
        data_json = demjson.decode(res.text)
        data_df = pd.DataFrame(data_json)
        try:
            main_contract = data_df.iloc[0, :3]
            subscribe_cffex_list.append(main_contract)
        except:
            print(item, "无主力连续合约")
            continue
    print("主力连续合约获取成功")
    return pd.DataFrame(subscribe_cffex_list)