apscheduler | Task scheduling library for Python | Job Scheduling library
kandi X-RAY | apscheduler Summary
kandi X-RAY | apscheduler Summary
Task scheduling library for Python
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Top functions reviewed by kandi - BETA
- Adds a schedule to the scheduler
- Ensures that the services are ready
- Append a weekday expression
- Return the weekday index
- Returns the next value for a date range
- Get the minimum value
- Scheduler middleware
- The original WSGI application
- Get the result of a job
- Get a list of scheduled schedules
- Remove a schedule
- Run the async scheduler
- Return the next value to the next value
- Start the service in the background
- Runs a function asynchronously
- Adds a new job to the scheduler
- Get a schedule by id
apscheduler Key Features
apscheduler Examples and Code Snippets
$ pip install apscheduler==3.0.1
from apscheduler.schedulers.blocking import BlockingScheduler
sched = BlockingScheduler()
@sched.scheduled_job('interval', minutes=1)
def job():
print 'This job is run every minute.'
sched.start()
web: guni
"""
Example demonstrating use with ASGI (raw ASGI application, no framework).
Requires the "postgresql" service to be running.
To install prerequisites: pip install sqlalchemy asyncpg uvicorn
To run: uvicorn asgi_noframework:app
It should print a l
"""
Example demonstrating use with the Starlette web framework.
Requires the "postgresql" service to be running.
To install prerequisites: pip install sqlalchemy asycnpg starlette uvicorn
To run: uvicorn asgi_starlette:app
It should print a line on
"""
Example demonstrating use with the FastAPI web framework.
Requires the "postgresql" service to be running.
To install prerequisites: pip install sqlalchemy asycnpg fastapi uvicorn
To run: uvicorn asgi_fastapi:app
It should print a line on the c
from multiprocessing import Process
from scrapy.crawler import CrawlerRunner
from scrapy.utils.project import get_project_settings
from scrapy.utils.log import configure_logging
from apscheduler.schedulers.blocking import BlockingSchedule
from scrapy.crawler import CrawlerRunner
from scrapy.utils.project import get_project_settings
from scrapy.utils.log import configure_logging
from twisted.internet import reactor
from apscheduler.schedulers.twisted import TwistedScheduler
class MaxInstancesCancelEarliestProcessPoolExecutor(BasePoolExecutor):
def __init__(self):
pool = ProcessPool()
pool.submit = lambda function, *args: pool.schedule(function, args=args)
super().__init__(pool)
from dask.distributed import Client, fire_and_forget
client = Client('127.0.0.1:8786')
fire_and_forget(client.submit(function_to_submit, 1))
fire_and_forget(client.submit(function_to_submit, 3))
# your script can now end and the scheduler
executors = {
'default': ThreadPoolExecutor(1)
}
scheduler = BackgroundScheduler(jobstores=jobstores, executors=executors, job_defaults=job_defaults, timezone=utc)
Community Discussions
Trending Discussions on apscheduler
QUESTION
I am running a telegram bot with the code below.
...ANSWER
Answered 2022-Apr-05 at 11:08There is a simple solution to this:
QUESTION
I have the following Python code to start APScheduler/TwistedScheduler cronjob to start the spider.
Using one spider was not a problem and worked great. However using two spiders result into the error: twisted.internet.error.ReactorAlreadyInstalledError: reactor already installed
.
I did found a related question, using CrawlerRunner
as the solution. However, I'm using TwistedScheduler object, so I do not know how to get this working using multiple cron jobs (multiple add_job()
).
ANSWER
Answered 2022-Apr-01 at 03:50https://docs.scrapy.org/en/latest/topics/practices.html#run-scrapy-from-a-script
There’s another Scrapy utility that provides more control over the crawling process: scrapy.crawler.CrawlerRunner. This class is a thin wrapper that encapsulates some simple helpers to run multiple crawlers, but it won’t start or interfere with existing reactors in any way.
It’s recommended you use CrawlerRunner instead of CrawlerProcess if your application is already using Twisted and you want to run Scrapy in the same reactor.
https://docs.scrapy.org/en/latest/topics/practices.html#running-multiple-spiders-in-the-same-process
By default, Scrapy runs a single spider per process when you run scrapy crawl. However, Scrapy supports running multiple spiders per process using the internal API.
QUESTION
I'm using apscheduler-django and I created a task that loops every 10 seconds.
This function will make a request to an API and save the content to my database (PostgreSQL).
This is my task:
...ANSWER
Answered 2022-Mar-14 at 19:29apscheduler
and apscheduler-django
don't directly support that.
You can implement and use a custom executor that tracks the process running a job and kills the process if trying to submit a job that is currently running.
Here's a MaxInstancesCancelEarliestProcessPoolExecutor
that uses pebble.ProcessPool
.
QUESTION
I have this python code that uses the apscheduler
library to submit processes, it works fine:
ANSWER
Answered 2022-Mar-07 at 01:32Dask distributed has a fire_and_forget
method which is an alternative to e.g. client.compute
or dask.distributed.wait
if you want the scheduler to hang on to the tasks even if the futures have fallen out of scope on the python process which submitted them.
QUESTION
In my program, I have scheduled a task that is aimed at changing the status of insurance to Expiré if the due date is equal to the current date when I run the program. The script supposes to loop up throughout the Contract's table and fetches the rows that are corresponding to the condition we used in the script. However, it is changing the status of the whole table including rows that should not be affected by the imposed condition. Here is the jobs.py file that is scheduling the task of changing the status of the insurance to Expiré if the condition is true.
...ANSWER
Answered 2022-Mar-02 at 10:54You should not update the contractList
, since that is a queryset with all records, you update that item with:
QUESTION
I am trying to run a python async app with an asyncioscheduler scheduled job but the APScheduler fails during build because of this error:
'Only timezones from the pytz library are supported' error
I do include pytz in my app and i am passing the timezone. What is causing the error?
I am calling the asyncioscheduler in a class where i create job manager:
...ANSWER
Answered 2021-Aug-18 at 16:21Ok so it required a dependency tzlocal==2.1 so it could get local timezone, i assume for some reason the version that the module has does not work on my system
QUESTION
I'm trying to make my first Telegram bot on Python. I use the python-telegram-bot, Flask, run it in Google Cloud Run. Locally on my machine everything works fine, when I deploy it (using Docker) to Google Cloud Run everything also works fine until the moment when Google Cloud Run stops the instance. That's what I see in Gloud Run logs:
...ANSWER
Answered 2022-Feb-24 at 07:51TBF, I'm not familiar with Google Cloud Run, but if I understand correctly the point is that you code will only be invoked when a request is made to the app, i.e. it's one of those "serverless" setups - is that correct?
If so: What updater.start_polling()
does is start a long running background thread that fetches updates continuously. To have your bot responsive 24/7 with this method, your script needs to run 24/7. Now the point of serverless setups is that your code only runs on demand, so for this hosting method a more reasonable approach would be to only invoke your code when your bot receives an update. This can achieved using a webhook instead of long polling. There is a section on this in the PTB wiki. See also this thread about AWS Lambda, which is similar AFAIK.
However one should note that stateful logic like ConversationHandler
is hard to realize in such setups: By default ConversationHandler
keeps track of the current state in memory, so the information is lost on shutdown of the process. You can use persistence to store the data, but I'm not sure how well this works with serverless setups - there might be race conditions if multiple updates come in at the same time.
So another idea would be to switch to a different hosting service that allows to run your process 24/7.
Disclaimer: I'm currently the maintainer of python-telegram-bot
.
QUESTION
Is there a way which i can use to limit the two jobs to run in parallel in apscheduler? Basically i don't want the two jobs to be running at the same time. Is this supported by apscheduler natively ?
...ANSWER
Answered 2022-Feb-03 at 16:00Just set the ThreadPoolExecutor
to 1 max worker :
QUESTION
My goal is to schedule the same function (with different arguments) at different intervals/ dates. This is what I wrote so far (I'm using Flask APScheduler):
...ANSWER
Answered 2022-Jan-26 at 19:58I had to use BackgroundScheduler
from APScheduler. Now it does exactly what I want it to do.
QUESTION
I have a class
that has triggers, and I'd like to update these triggers when the job hit the proper time.
My class:
...ANSWER
Answered 2022-Jan-25 at 22:08You have to pass function to add_job
but instead of it you passed returned value of the trigger.UpdateSetRefresh
.
So correct statement would be like:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install apscheduler
You can use apscheduler like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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