异步asyncio加锁 的正确用法

import aiohttp

import asyncio

import execjs

import threading

global pages

global count



headers = {

    "Accept": "*/*",

    "Accept-Encoding": "gzip, deflate",

    "Accept-Language": "en-US,en;q=0.9",

    "Cache-Control": "no-cache",

    "Connection": "keep-alive",

    "Host": "dcfm.eastmoney.com",

    "Pragma": "no-cache",

    "Referer": "http://data.eastmoney.com/xg/xg/default.html",

    "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/69.0.3497.81 Chrome/69.0.3497.81 Safari/537.36",

}



home_url = 'http://dcfm.eastmoney.com/em_mutisvcexpandinterface/api/js/get?type=XGSG_LB&token=70f12f2f4f091e459a279469fe49eca5&st=purchasedate,securitycode&sr=-1&p={}&ps=50&js=var%20hsEnHLwG={{pages:(tp),data:(x)}}&rt=53512217'



loop = asyncio.get_event_loop()

# lock = threading.Lock()

lock = asyncio.Lock()

def parse_json(content):

    content += ';function getV(){return hsEnHLwG;}'

    ctx = execjs.compile(content)

    result = ctx.call('getV')

    return result





async def fetch(session,page):

    global pages

    global count

    async with session.get(home_url.format(page),headers=headers) as resp:

        # print(f'here：： {page}')

        content = await resp.text()



        try:

            js_content = parse_json(content)

            for stock_info in js_content['data']:

                securityshortname = stock_info['securityshortname']

                # print(securityshortname)

        except Exception as e:

            print(e)



        async with lock:

            count=count+1



        print(f'count:{count}')

        if count == pages:

            print('End of loop')

            loop.stop()







async def main():

    global pages

    global count

    count=0

    async with aiohttp.ClientSession() as session:

        async with session.get(home_url.format(1), headers=headers) as resp:



            content = await resp.text()

            js_data = parse_json(content)

            pages = js_data['pages']

            print(f'pages: {pages}')

            for page in range(1,pages+1):

                task = asyncio.ensure_future(fetch(session,page))



            await asyncio.sleep(1)





asyncio.ensure_future(main())

loop.run_forever()