Python Schedule not work in Flask

Question

I am importing Schedule into Flask. My project contains WSGI however I know little about the relationship between Flask and WSGI. Now I have three main files:

• wsgi.py: Automatically generated by other tool.
• app.py : I put client request here.
• test.py: Used to test Schedule.

I want to start a task which is a long task when server launch. Here is the part of wsgi.py:

# -*- coding: utf-8 -*-
from threading import Thread
import test


t = Thread(target=test.job)
t.start()

if __name__ == '__main__':
    ...

As you see I start a thread and let the job work in it.Here is my test.py.

import schedule


def job():
    schedule.every(1).seconds.do(pr)


def pr():
    print("I'm working...")

My problem is that the job never starts.

Answer 1

I find out my problem.I never let schedule execute jobs. Now wsgi.py looks like this.

# -*- coding: utf-8 -*-
from threading import Thread
import test

schedule.every(1).seconds.do(test.job)
t = Thread(target=test.run_schedule)
t.start()

if __name__ == '__main__':
    ...

And test.py:

import schedule
import time

start_time = time.time()


def job():
    print("I'm working..." + str(time.time() - start_time))


def run_schedule():
    while True:
        schedule.run_pending()
        time.sleep(1)

In order to work in separate thread, I create a thread and in this thread I loop every 1ms. In loop, schedule invoke run_pending to call the job if time out (in my case it's 1s).