Python 3.x 烧瓶运行函数RuntimeError“；线程'；中没有当前事件循环；“线程”；

我有一个flask应用程序（python3.7），它调用函数并以纯文本形式返回股票数据。 脚本在自己的.py中运行时工作正常（从stock.screener导入screener>>stock\u list=screener（filters=filters，order='price'，table='Overview'）。 但是，在flask应用程序中，我发现以下错误： 线程“thread-2”中没有当前事件循环。 **尝试了这里的一切来让它工作——asyncio，只是在杂草中编码

尝试了异步、异步..我只是被杂草缠住了-提前谢谢

from flask import Flask
from stock.screener import Screener

app = Flask(__name__)

@app.route('/')
def check_server():
    return "Server is Running!"

@app.route('/test')
def run_screener():

    try:
        r = Screener(filters=['cap_nano','sh_avgvol_o200','sh_price_u10','sh_relvol_o2','sh_short_u30','ta_rsi_os40'], order='price', table='Overview')
        return r
    except Exception as e: 
        return str(e), 500


if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0')

预期结果：

No. | Ticker | Company                           | Sector          | Industry                            | Country        | Market Cap | P/E  | Price | Change  | Volume    
--- | ------ | --------------------------------- | --------------- | ----------------------------------- | -------------- | ---------- | ---- | ----- | ------- | ----------
1   | OHGI   | One Horizon Group, Inc.           | Technology      | Application Software                | United Kingdom | 1.44M      | -    | 0.02  | -8.57%  | 660,189   
2   | LODE   | Comstock Mining Inc.              | Basic Materials | Gold                                | USA            | 11.57M     | -    | 0.13  | -9.29%  | 4,668,153 
3   | VIVE   | Viveve Medical, Inc.              | Healthcare      | Medical Appliances & Equipment      | USA            | 6.58M      | -    | 0.13  | -8.47%  | 6,520,180 
4   | UPL    | Ultra Petroleum Corp.             | Basic Materials | Independent Oil & Gas               | USA            | 26.65M     | 0.34 | 0.14  | -21.10% | 14,748,106