slack_hacker_hour_app.py

from flask import Flask
from slackeventsapi import SlackEventAdapter
from slack import WebClient

app = Flask(__name__)

SLACK_SIGNING_SECRET = None

slack_events_adapter = SlackEventAdapter(SLACK_SIGNING_SECRET, "/slack/events", app)
slack_client = WebClient(SLACK_BOT_TOKEN)

@slack_events_adapter.on("app_mention")
def handle_mention(event_data):
    
    message = event_data["event"]

    if message.get("subtype") is None:
        channel = message["channel"]
        text = "Hello <@%s>: lets get this bread" % message["user"]
        data = dict(
            channel=channel,
            text=text
        )

        slack_client.api_call("chat.postMessage", data=data)

@app.route("/")
def hello():
    return "Hello World!\n"

if __name__ == '__main__':
    app.run()