Python Flask shutdown event handler
There is no app.stop() if that is what you are looking for, however using module atexit you can do something similar:
https://docs.python.org/2/library/atexit.html
Consider this:
import atexit#defining function to run on shutdowndef close_running_threads(): for thread in the_threads: thread.join() print "Threads complete, ready to finish"#Register the function to be called on exitatexit.register(close_running_threads)#start your processapp.run()Also of note-atexit will not be called if you force your server down using Ctrl-C.
For that there is another module- signal.
from flask import requestBASE_URL = "http://127.0.0.1:5000"SHUTDOWN = "/shutdown"def shutdown_server(): func = request.environ.get('werkzeug.server.shutdown') if func is None: raise RuntimeError('Not running with the Werkzeug Server') func()@app.route(SHUTDOWN, methods=['POST'])def shutdown(): shutdown_server() return 'Server shutting down...'There seems to be a way mentioned here :-http://web.archive.org/web/20190706125149/http://flask.pocoo.org/snippets/67