小编gau*_*rav的帖子

class db {

private $_pdo ,
        $_query,
        $_error = false,
        $_results ,
        $_count = 0 ; 

private  function __construct () {
    try {

        $host = config::get('mysql/host');
        $database = config::get('mysql/db');
        $username = config::get('mysql/user');
        $pasword = config::get('mysql/password');

        $this->_pdo = new PDO("mysql:host=$host;dbname=$database", $username, $pasword);

        }  catch (PDOException $e) {
            die($e->getMessage()) ;
        }

} 

public static function getInstance() {
    if(!isset(self::$_instance)) {
        self::$_instance = new db () ;
    }

    return self::$_instance ;
} 


public function query($sql,$params=array()) {

    $this->_error = false ;
    if($this->_query = $this->_pdo->prepare($sql)) { …

我正在尝试aiohttp和asyncio第一次出现错误

[WinError 10054] 现有连接被远程主机强行关闭

但是当我获取requests它正常工作时相同的 url.so这个错误意味着什么以及如何解决它？

我的代码

import aiohttp 
import asyncio

url = 'https://nseindia.com/api/historical/fo/derivatives?&from=24-01-2020&to=24-01-2020&expiryDate=06-FEB-2020&instrumentType=OPTIDX&symbol=NIFTY&csv=true'

headers = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36"}
async def get_data():
    async with aiohttp.ClientSession(headers=headers) as session:
        async with session.get(url) as resp:
            result = await resp.text()
            return result


async def main():
    result = await get_data()
    return result

asyncio.run(main())