所以我正在創(chuàng)建這個應(yīng)用程序，它的一部分是一個網(wǎng)頁，其中交易算法正在使用實時數(shù)據(jù)進(jìn)行自我測試。所有這些都有效，但問題是如果我離開（退出）網(wǎng)頁，它就會停止。我想知道如何讓它無限期地在后臺運(yùn)行，因為我希望算法繼續(xù)做它的事情。這是我想在后臺運(yùn)行的路線。@app.route('/live-data-source')def live_data_source(): def get_live_data(): live_options = lo.Options() while True: live_options.run() live_options.update_strategy() trades = live_options.get_all_option_trades() trades = trades[0] json_data = json.dumps( {'data': trades}) yield f"data:{json_data}\n\n" time.sleep(5) return Response(get_live_data(), mimetype='text/event-stream')我研究過多線程，但不太確定這是否適合這項工作。我對燒瓶還是個新手，所以這是一個可憐的問題。如果您需要更多信息，請發(fā)表評論。
1 回答
三國紛爭
TA貢獻(xiàn)1804條經(jīng)驗 獲得超7個贊
您可以按照以下方式進(jìn)行操作 - 下面是 100% 有效的示例。請注意，在生產(chǎn)中使用 Celery 來執(zhí)行此類任務(wù)，或者自己編寫另一個守護(hù)程序應(yīng)用程序（另一個進(jìn)程），并借助消息隊列（例如 RabbitMQ）或公共數(shù)據(jù)庫的幫助從 http 服務(wù)器向其提供任務(wù)。
如果對下面的代碼有任何疑問，請隨時提問，這對我來說是很好的練習(xí)：
from flask import Flask, current_app
import threading
from threading import Thread, Event
import time
from random import randint
app = Flask(__name__)
# use the dict to store events to stop other treads
# one event per thread !
app.config["ThreadWorkerActive"] = dict()
def do_work(e: Event):
"""function just for another one thread to do some work"""
while True:
if e.is_set():
break # can be stopped from another trhead
print(f"{threading.current_thread().getName()} working now ...")
time.sleep(2)
print(f"{threading.current_thread().getName()} was stoped ...")
@app.route("/long_thread", methods=["GET"])
def long_thread_task():
"""Allows to start a new thread"""
th_name = f"Th-{randint(100000, 999999)}" # not really unique actually
stop_event = Event() # is used to stop another thread
th = Thread(target=do_work, args=(stop_event, ), name=th_name, daemon=True)
th.start()
current_app.config["ThreadWorkerActive"][th_name] = stop_event
return f"{th_name} was created!"
@app.route("/stop_thread/<th_id>", methods=["GET"])
def stop_thread_task(th_id):
th_name = f"Th-{th_id}"
if th_name in current_app.config["ThreadWorkerActive"].keys():
e = current_app.config["ThreadWorkerActive"].get(th_name)
if e:
e.set()
current_app.config["ThreadWorkerActive"].pop(th_name)
return f"Th-{th_id} was asked to stop"
else:
return "Sorry something went wrong..."
else:
return f"Th-{th_id} not found"
@app.route("/", methods=["GET"])
def index_route():
text = ("/long_thread - create another thread. "
"/stop_thread/th_id - stop thread with a certain id. "
f"Available Threads: {'; '.join(current_app.config['ThreadWorkerActive'].keys())}")
return text
if __name__ == '__main__':
app.run(host="0.0.0.0", port=9999)
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