flask：

pip3 install flask celery

flask 项目文件：

包含 app.py，config.py。

app.py：

from flask import Flask, flash, render_template, request, redirect, url_for
from celery import Celery


app = Flask(__name__)
app.config.from_object("config")
app.secret_key = app.config['SECRET_KEY']

client = Celery(app.name, broker=app.config['CELERY_BROKER_URL'])
client.conf.update(app.config)

@app.route('/', methods=['GET', 'POST'])
def index():
    if request.method == 'GET':
        send_mail.apply_async(args=['data'], countdown=5)
        return 'get ' + app.secret_key

    elif request.method == 'POST':
        # flash(“Message scheduled”)
        send_mail.apply_async(args=['data'], countdown=5)
        return 'post'

@client.task
def send_mail(data):
    """ Function to send emails.
    """
    with app.app_context():
        msg = {}
        msg_body = data
        print(msg_body)
        return msg_body

if __name__ == '__main__':
    app.run(host='0.0.0.0',port=8000,debug=True)

config.py：

CELERY_BROKER_URL = 'redis://localhost:6379/0'
SECRET_KEY = 'sk1'

celery：

启动：celery -A app.client worker --loglevel=info --autoscale=5,1

redis：

启动：docker run -d -p 6379:6379 redis

flower：

pip3 install flower==1.2.0
启动：celery --broker=redis://localhost:6379/0 flower --port=8080