Cron jobs in python schedule jobs in python fastapi
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certainly! cron jobs are a time-based job scheduler in unix-like operating systems, but in python, you can achieve similar functionality using libraries like `apscheduler` or `schedule`. in this tutorial, we'll focus on using `apscheduler` to schedule jobs with fastapi.
setting up fastapi with apscheduler
#### step 1: install required packages
first, you need to install fastapi and apscheduler. you can do this using pip:
#### step 2: create a fastapi application
now, let’s create a simple fastapi application that uses apscheduler to run scheduled jobs.
explanation of the code:
1. **fastapi application**: we create a fastapi application instance.
2. **apscheduler**: an instance of `backgroundscheduler` is created from the `apscheduler` library. this scheduler will allow us to run jobs in the background without blocking the main fastapi application.
3. **job function**: we define a simple job function that prints the current time. this function will be executed at regular intervals.
4. **starting the scheduler**:
the `start_scheduler` function adds the job to the scheduler with an interval trigger, specifying that the job should run every 10 seconds.
the scheduler is started in the `on_startup` event of the fastapi app.
5. **shutting down the scheduler**: we make sure to shut down the scheduler when the fastapi app is shutting down, which is done in the `on_shutdown` event.
6. **root endpoint**: we define a simple root endpoint for our fastapi application that returns a welcome message.
running the application
to run the fastapi application, save the code in a file (e.g., `app.py`) and then execute the following command in your terminal:
testing the scheduled job
once the application is running, open your terminal or log where you run the fastapi application. you should see the job executing every 10 seconds, printing the current time to the console.
conclusion
using `apscheduler` with fastapi is a powerful way ...
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