Unable to configure Gunicorn to serve a flask app running another loop concurrently -

i have simple flask app, this:

# app.py flask import flask app = flask(__name__)  @app.route('/') def hello_world():     return 'hello, world!' 

i have slack bot reading messages

#bot.py def serve(self):     while true:             message, channel = self.parse_slack_output(self.slack_client.rtm_read())             if message , channel:                 self.handle_message(message, channel)             time.sleep(self.read_websocket_delay) 

i want both codes run concurrently. in app.py do:

#app.py if __name__ == "__main__":     import threading     import bot      flask_process = threading.thread(target=app.run)     bot_process = threading.thread(target=bot.serve)     bot_thread.start()     flask_thread.start() 

this code works expected $ python app.py, when bring in gunicorn bot thread doesn't seem work.

i have tried:

gunicorn app:app gunicorn --workers=2 app:app gunicorn --threads=2 app:app 

i tried multiprocessing library , got same results.

any idea how issue can tackled? thanks.

edit: understand how lame question is. shouldn't writing code in if __name__ = "__main__": block. not run gunicorn. directly picks app , runs it. still have figure how make handle bot thread.

i have made work following solution:

# app.py flask import flask import threading import bot  def create_app():     app = flask(__name__)     bot_process = threading.thread(target=bot.serve)     return app  app = create_app()  @app.route('/') def hello_world():     return 'hello, world!' 

this makes sure gunicorn --workers=1 app:app runs both app , bot in different threads. while works, 1 drawback solution not able scale number of workers > 1. not scale app thread, bot thread, don't want. bot unnecessarily listen messages in 2 threads.

any better solution in mind? please convey it. thanks.