Python flask run in background windows.
The flask command is a CLI for interacting with Flask apps.
Python flask run in background windows If your Flask application is called myapplication and the method which instantiates your application is called create_app, then you can run the command below. MarkupSafe comes with Everything looks good from here. Nov 6, 2024 · If you are utilizing a Flask web hosting environment and lack access to cron commands, you may be pondering the challenge: How can I execute a Python function every hour? This post delves into several effective methods to schedule tasks within a Flask application. Aug 31, 2024 · Flask is a popular web framework for building web applications in Python. The flask run command is the preferred way to start the development server. However, when handling long-running tasks (e. when running curl localhost:5000/run/"ls -l" (command is ls -l) -> Feb 24, 2022 · How to Create A Simple Flask Application on Windows You’re probably here because like me you initially had problems understanding what to do in the mysterious world of python in order to get Aug 2, 2020 · 3. Introduction Let’s use an example to demonstrate how to add a background thread to Flask app. This page outlines the basics of running Waitress. It supports Windows directly. 30. Django is easy to use as compared to Flask but Flask provides you with the versatility to program with. exe tutorial, we will learn how to run python scripts in the background, without any the appearance of any console window. To understand what Flask is you have to understand a few general terms. Jun 4, 2010 · I have Python script bgservice. # run. I have already tried to implement a solution as suggested here and here without success. Mar 5, 2023 · Step 1: Install Python Before installing Flask, we need to install Python on our Windows machine. But I want to be able to regis Nov 7, 2021 · To run a permanent background task in the same process as a Flask application, use a threading. Step 2: Create an Jul 31, 2025 · Configure Python web apps to run with Internet Information Services (IIS) from a Windows virtual machine by specifying settings in their web. First check if the Flask app is really running or maybe it has crashed. Please note that this answer is valid for Waitress 1. As a new user, Flask is to be used. Advanced Usage: Running Worker Pools with Systemd If you are running your background processes with Celery, then extending the above solution to cover your workers is simple, because Celery allows you to start your pool of worker processes with a single command. Feb 4, 2025 · This is part 2 in a 3-part series where I share my experiences building a Python desktop app using pywebview and flask, and then packaging it for Windows using Briefcase. 5 days ago · Flask, a lightweight and flexible Python web framework, is a favorite among developers for building web applications quickly. from flask_executor import Executor executor = Executor(app) @app. I have a simple folder with just two files: Sep 9, 2021 · How to run flask app automatically during windows boot? I have a simple python app Dec 28, 2013 · Use the shebang line in your python script. I am developing this using Flask, Gunicorn, and nginx. I then have flask app running as a personal API which my front end will connect to to display the data in my frontend. A good starting point is the official Flask documentation and the Celery documentation. 0 is true, the question asker's question cannot be resolved with this approach, as Flask does not support background tasks (which they also point out in their documentation). It has built-in async worker support using gevent or eventlet. In this guide, we’ll walk through creating a web app that streams live video from a Raspberry Pi camera and lets you control a pan/tilt servo mechanism using buttons. The script constantly pulls data from an external API, parses it and sends it to a db I have set up. exe in order to run a python script as a background process: Python scripts (files with the extension . Flask app setup Assuming you already know Flask, and installed it on your Windows using pip install flask, there a few considerations for structuring your app: The general recommendation is to set your app to act like a Python package, so create a folder containing at least a __init__. It is a collection of libraries and modules. config files. Let's do some debugging. Mar 22, 2013 · This is a bit old thread, but if someone experimenting, learning, or testing basic flask app, started from a script that runs in the background, the quickest way to stop it is to kill the process running on the port you are running your app on. Ollama running in background on Windows 10 Nov 16, 2024 · Added in version 0. It is easy to install as it does not require additional dependencies or compilation. After you had gone through the tutorial, you would have installed Python 3 on your Windows machine. bat’ is present using ‘cd’ command. May 28, 2025 · 01. Instead, use a task queue to send the necessary data to another process that will run the task in the background while the request returns immediately. Mar 26, 2024 · Using Threads to Execute Long-Running Tasks in Flask Flask is a lightweight web framework for Python that is commonly used to build web applications. I can run it manually but how dot i get it to startup as a service so i can Feb 5, 2025 · Windows Task Scheduler allows you to schedule and automate running your Python script in the background, such as at system startup, on a schedule, or upon specific events. Waitress now provides a simple command line Utility called waitress-serve for running the Flask Application. However, there may be scenarios where you need to stop the application programmatically, without relying on user input. py) will be executed by python. However, it is an optional spec item that the system should support Windows. This way, I can also keep my computer locked if I am not at home. Part 1 discussed the use Aug 5, 2020 · Learn how to quickly deploy a functional Python Flask app to Amazon Web Services EC2 instances with tmux and no stress. Aug 14, 2021 · This short article covers a template for setting up a Flask based web app with a background thread. The flask command is a CLI for interacting with Flask apps. Frameworks are used for developing web platforms. But the real popular ones are Flask and Django. Oct 15, 2022 · Skills Required Setup python development environment Flask python module introduction Sub mounting a flask application under a URL prefix Run a python Flask server as a windows background service using nssm Waitress as Flask server WSGI Please make sure to have all the skills mentioned above to understand and execute the code mentioned below. Communicate through a queue. - 45 I have a webapp that's built on python/Flask and it has a corresponding background job that runs continuously, periodically polling for data for each registered user. Running a Flask web application as a serviceThis is a variation on the generic example. Here are a few methods to achieve this: Mar 18, 2019 · Run journalctl --help to see a more complete summary of options. Apr 10, 2019 · I am trying to build a Flask application on Windows where user uploads a big Excel file then it is processed in Python which takes 4-5 minutes. May 9, 2014 · I was able to get my flask app running as a service thanks to Is it possible to run a Python script as a service in Windows? If possible, how?, but when it comes to stopping it i cannot. Install Flask in a virtual environment to avoid problems with conflicting libraries. 2, use the --app option to point the command at your app [Solved] Use nohup to make the Python Flask project run in the background on the Ubuntu system, Programmer Sought, the best programmer technical posts sharing site. Waitress ¶ Waitress is a pure Python WSGI server. The docs describe how to use CLI commands and add custom commands. in this tutorial, we will learn how to set up a python flask application to run as a windows background service using nssm (non-sucking service manager). Oct 24, 2025 · Building a webpage using python. In this example, it pretends there is a file named my_wsgi_project. There is scheduled downtime for the server every In this tutorial we will explore how to run your flask applications in the background using PM2 - process manager. py import os from waitress import serve from my_wsgi_project import app # Import your Jul 26, 2022 · In this article, learn how to build a Python application that runs as a Windows Service to handle ongoing routine tasks using NSSM. py & It will run the program in the background also simultaneously you can use a terminal. Method 1: Using APScheduler One of the most effective ways to schedule your functions is through the APScheduler library. However you may have to specify which interpreter to use via the –interpreter command so that your application will know which python version to use . Jun 17, 2020 · Do you need to run background_task as part of the same process as Flask? Why not just run it separately? Sep 2, 2016 · We run the python application, it starts the Flask web service, it starts Chrome in kiosk mode, Chrome loads the web GUI, the user is happy, the user finishes and clicks the close browser window button, python should stop the server and terminate. What I am thinking of doing is to have the route which take Aug 19, 2023 · A tutorial to run Celery with Flask: Step 1: Installing Redis: First we need to install Redis in our system. I'm using the template found here: Is it possible to run a Python script as a service in Windows? If possible, how? Here's my run. Go to the official Python website and download the latest version of Python for Windows. py and I want it to run all the time, because it is part of the web service I build. Use the Start Directory where you python file exists. Tools like Celery or Python’s threading, combined with NumPy Array Operations for data-intensive tasks, make Flask suitable for applications Sep 15, 2015 · I have a python script which takes an input, formats it into a command which calls another script on the server, and then executes using subprocess: import sys, subprocess thingy = sys. Mar 31, 2022 · Basically, when you call the . Start with a simple docker ps (see if you notice anything strange there) followed by Aug 1, 2020 · In Python This example will change the current working directory to the directory that the Python script resides in. To run a Flask server in the background, you can use various approaches, such as using terminal commands, a process manager like systemd, or Python's multiprocessing module. Deploying Flask on Windows for Nov 24, 2024 · By employing the threading module, you can easily run some code without blocking the main application thread, allowing your Flask app to remain responsive while executing background tasks. If the program doesn’t initiate, search for it in Windows programs and launch it from there. Python Language Creating a Windows service using Python Running a Flask web application as a service Fastest Entity Framework Extensions Bulk Insert Apr 1, 2024 · Learn how to develop Python Flask APIs with Celery and RabbitMQ, a powerful combination for efficient background task handling. g. py works fine, except there is an awful lot of output that I don't really want to see (I have logging built into my app and can view that separately if I need to). Step 2: Adding all the dependencies to run a celery task Make Apr 14, 2019 · I am trying to get a Flask app to run as a Service in Windows. py & or simply (without making any change in your program) nohup python /path/to/test. Queue which is thread-safe. Flask supports Python 3. Werkzeug implements WSGI, the standard Python interface between applications and servers. submit(long_running_job) return 'Scheduled a job' def long_running_job #some long running processing here This not only runs jobs in the background but gives them access to the app context. argv[1] c Sep 10, 2022 · Ctrl + C is an awesome and common way to stop most process especially when being run from the terminal. 8 uning pyinstaller Nov 28, 2019 · I will be using the BackgroundScheduler for this tutorial — as I wanted the task to run as a background process inside a Flask server. Discover how to run functions in the background of your Python Flask app using threading, ensuring continuous data processing without affecting performance. js apps is what is used. Knowledge of Python and basic knowledge of Flask is required. , sending emails, processing large files, generating reports), executing them synchronously within a Flask request can lead to poor user experience—users wait indefinitely for a response while the task completes. In this case we’re also using the multiprocessing module due to an issue accessing WSGIRequestHandler. Background tasks ¶ Async functions will run in an event loop until they complete, at which stage the event loop will stop. In this setup, I try to install flask up and running in Microsoft IIS (Windows Server 2012 R2 Jul 12, 2020 · How do I run a flask app as a service in Windows? Inside myapp. Flask is a Python micro-framework for web development. By using the Jan 24, 2023 · Let take a scenario : If you want to run python API on windows server in such a way that it starts automatically when server rebooted. The state should soon transition to "Running" and Flask will be working in the background: And with Flask running as a Windows Service, please confirm that your Flask app is available from your browser. It is completely written in Python language. delay () function it is supposed to take your python function and send it to celery to process in the background but instead things hang because a connection could not be made. py & Do not forget to use & to put it in the background. py is the file: In Linux and mac, for running py files in the background you just need to add & sign after using command it will tell the interpreter to run the program in the background python filename. Dependencies ¶ These distributions will be installed automatically when installing Flask. In this tutorial we will explore how to stop a Django application or Flask application withou… Sep 15, 2015 · I have a python script which takes an input, formats it into a command which calls another script on the server, and then executes using subprocess: import sys, subprocess thingy = sys. The intent of my program is to have the GUI running the whole time, and run the Flask app as well in the "background. 4: Waitress comes bundled with a thin command-line wrapper around the waitress. It does not support Windows (but does run on WSL). Features of asynchronous programming Improves Performance – Handles multiple tasks without waiting for each to complete. Background tasks enable asynchronous execution, allowing Flask to process requests while tasks run concurrently. That's it! Sep 22, 2022 · Change the directory of the command prompt to the directory where the ‘run_server. Traditionally Sep 18, 2023 · Looking to run your Flask application in the background? Check out our guide on how to run a Flask application in the background with Run flask in background. More than just this, it sets out a more standardised approach to designing an application. py, which i've installed as a service following the instructions i Jun 4, 2010 · I have Python script bgservice. Concepts Before diving into the implementation, let’s understand some key Sep 7, 2023 · In this pythonw. py >>/dev/null Installation Python Version ¶ We recommend using the latest version of Python. This is the twenty second installment of the Flask Mega-Tutorial series, in which I'm going to tell you how to create background jobs that run independently of the web server. Jan 18, 2013 · Starting the thread from the non reloader process will prevent the thread from accessing your Flask app context (it runs in the reloader process), so depending on what you want to achieve, you have to decide between starting it from the main process (is_running_from_reloader() returning False) or the reloader process (is_running_from_reloader() returning True). Are you running it on windows or Linux? What url are you entering in the browser to get to the flask app?. You just need to import your app script and invoke it’s run() method in the service’s main() function. Using the Werkzeug Server Flask Apr 26, 2024 · An Ollama icon will appear on the bottom bar in Windows. Celery is a powerful task queue that can be used for Aug 21, 2020 · pythonw <nameOfFile. Jan 14, 2022 · Starting A Flask Application with PM2 So how do you use PM2 with python, specifically with flask apps?. Why does running `flask run` on Windows result in "flask is not recognized as an internal or external command, operable program or batch file" Nov 24, 2021 · I have run into a similar problem building some online cassino games using flask. In this tutorial we will explore how to stop a Django application or Flask application withou… Jun 2, 2023 · This post will show you how you can configure your raspberry pi to start your Python script and Flask web app on boot using the systemd. Flask is a lightweight web framework for Python, while Celery is a distributed task queue that allows background tasks to run asynchronously. While deploying Flask apps on Linux servers is common (thanks to tools like Gunicorn and Nginx), many teams and enterprises operate in Windows environments—whether due to legacy systems, infrastructure constraints, or team expertise. In this video, you’ll learn: How to prepare a Python script for Linux; How to run a Linux daemon; How to run a Python script as a Windows service; How to make the process easier by using NSSM on Dec 11, 2024 · Flask is a lightweight Python web framework that provides a flexible and modular way to build web applications, while Celery is a distributed task queue that allows you to run tasks asynchronously in the background. As it is easier to Mar 30, 2024 · Reference Links: Flask Documentation Python threading Documentation Conclusion: Starting a Flask application in a separate thread allows you to run the application concurrently with other parts of your program. py with an object named app like a typical Flask web application. Jinja is a template language that renders the pages your application serves. Apr 20, 2024 · When developing a Flask application in Python, it is common to use the Ctrl-C keyboard shortcut to stop the application. Flask is a Python framework good for developing web apps. You are reading the 2024… Flask is a Python micro-framework for web development. As of Flask 2. How can I make it run continuously even after I logout SSH? This must be really trivial, but i just cannot find a way to run a flask web service on a windows server (win server 2008). I want to make a Flask+Nginx+Gunicorn deployment. Flask app won't run in background I'm using MacOS. Unlike Django, it is only written in Python. Nov 24, 2021 · I have run into a similar problem building some online cassino games using flask. Flask is such a type of web application framework. route('/someJob') def index(): executor. " This is so that the user can interface with the GUI and then refresh the web page to see the update. Occasionally, you may need to execute long-running tasks within a Flask application without blocking the main thread. route (‘/’) def hello_world (): return ‘Hello, World! ‘ How do I run a python flask on Windows? Step 1: Install Virtual Environment. It is quite simple , the same command we use for working with node. Jan 21, 2020 · I want to find a way in which when the computer goes to sleep, PowerShell continues to run the python codes in the background. I have a web-service that runs long-running jobs (in the order of several hours). Once the download is complete, run the installer and follow the instructions to install Python on your system. I can disable this output by running: python3 app. Traditional Flask views will still be appropriate for most use cases, but Flask’s async support enables writing and using code that wasn’t possible natively before. Sep 24, 2023 · Learn how to execute Python subprocesses in the background, allowing your main script to perform other tasks without waiting for them to finish. Nov 14, 2024 · See the options for job scheduling with Flask, including APScheduler, Cron Jobs, RunMyJobs by Redwood, and more. exe by default. this will allow your flask Feb 28, 2022 · Flask is a Python micro-framework for web development. Dec 4, 2024 · Using Flask and Celery to Create a Background Task System In modern web development, handling requests and tasks in real-time can be challenging, especially when dealing with long-running or asynchronous processes. It also provides a way to store jobs so users can check back in to get statuses. Apr 7, 2016 · However, when I turn off the Windows machine and the PuTTY session, the Flask server shuts down! How can I set it up so that the Flask server continues even when the Windows machine is turned off? To start Flask, choose Application > Start "Flask app". I have little experience with Windows programming and no experience at all with Windows services. Apr 4, 2023 · Running a Python File in the Background with nohup When running a Python file on the backend, such as a Flask or FastAPI application, it’s often necessary to keep the process running in the background even after the user logs out. I would like this background job to start when the system starts and keep running til it shuts down. Flask can run just fine in a separate thread, but the reloader expects to run in the main thread. Background Tasks with Celery If your application has a long running task, such as processing some uploaded data or sending email, you don’t want to wait for it to finish during a request. Jun 2, 2021 · Running a flask instance in python in the background Asked 4 years ago Modified 4 years ago Viewed 2k times Jul 23, 2025 · Flask is basically a Python module. This Learn how to use Celery with Flask for efficient background tasks and improve your application's performance. This is useful for development, and in production situations where serving of static assets is delegated to a reverse proxy, such as nginx or Apache. Flask includes a built-in development server, which supports non-production use. Part 1 discussed the use Apr 22, 2019 · I have a running Flask app that is working fine on a Linux (CentOS) server. I need to process those tasks in background after user uploads the file. Flask is easy to get started with and a great way to build websites and web applications. I have Nginx setup and running and I run gunicorn as described in the docs: gunicorn app:app But when I logout of the server the gunicorn process Mar 13, 2019 · Asynchronous background tasks in Flask-application using Celery While developing web-applications you may have faced functionality that takes more than a few seconds to complete. pip install flask That installation tutorial is a bit misleading, it refers to actually running it in a production environment. I've been using Flask to provide a simple web API for my k8055 USB interface board; fairly standard getters and putters, and Flask really made my life a lot easier. In the terminal, running: python3 app. Nov 23, 2017 · The Flask application factory: The Flask application factory concept is a methodology of structuring your app as a series of Blueprints, which can run individually, or together (even with different configurations). This will launch the Get Free GPT4o from https://codegive. Gunicorn ¶ Gunicorn is a pure Python WSGI server with simple configuration and multiple worker implementations for performance tuning. The command line arguments could change in future. serve function called waitress-serve. In this article, we will explore different approaches to gracefully stop a Flask application without using Ctrl-C. Jul 7, 2015 · You're running Flask in debug mode, which enables the reloader (reloads the Flask server when your code changes). 3 days ago · If you’ve worked with Flask, the lightweight Python web framework, you’ve likely encountered the frustrating error: `OSError: [Errno 98] Address already in use`. The reason I want to do this is that I need to produce a lot of data and plots in a short amount of time. Python Flask server as a windows background service using nssm Learning Software 7. These are the steps to create a flask applications as window services in windows 10 and python 3. Why Run Background Tasks in Flask? Flask’s synchronous nature means long-running tasks can delay responses, degrading performance. BTW, on reload, the previous Mar 6, 2019 · Life’s too short to wait for long running tasks in your requests, Flask is simple and Celery seems just right to fit the need of having background jobs processing some uploaded data, sending Hello everyone, I would like to have a python script run continuously in the background of my web application. Care to share any tips folks? Nov 14, 2024 · The idea of improving Flask performance using middleware and background tasks is genius—especially being able to run heavy tasks in the background without affecting the user experience, like Nov 23, 2024 · Explore effective methods to execute background functions seamlessly after Flask returns a response to the client. Role of nohup: nohup makes your script ignore Flask is a Python micro-framework for web development. Celery is a production grade solution for running background tasks that works well with flask. Use this link to do that. This can be useful in scenarios where you want to perform other tasks while the Flask application is running, or when you want to handle multiple requests simultaneously. This is where adding a background thread to Flask can be useful. BTW, on reload, the previous Flask is a Python micro-framework for web development. run it automatically without user login)? Flask is a Python micro-framework for web development. 9 and newer. It does not support streaming requests, full request data is always buffered. Flask is a popular lightweight Python-based web application framework. Next up is the trigger component, which holds the Dec 1, 2024 · Learn how to automate tasks using Flask and APScheduler for improved coding efficiency and productivity. The solution I found was to run a celery task with an infinite loop and save the current state of the task so that flask can access it anytime. It provides a simple and flexible way to develop web applications, but sometimes you may need to perform tasks in the background without blocking the main request/response cycle. Thread running a function with an infinite loop. Dec 6, 2016 · The best way to implement background tasks in flask is with Celery as explained in this SO post. com ### tutorial: running a python flask server as a windows background service using nssmin this tutorial, we will lea Jul 23, 2025 · With Python's built-in asyncio, we can introduce asynchronous behavior in Flask applications, allowing tasks like database queries and API requests to run without blocking the main application thread. Make it executable using the command, chmod +x test. May 20, 2024 · Learn how to create and manage background tasks in Flask applications using RQ and Celery. Look up how to schedule batch script in windows, it's pretty straightforward. Run the following commands to run the batch file as a background service Nov 13, 2025 · Flask is a popular microframework for building web applications in Python, known for its simplicity and flexibility. py> Here's the background. In addition to that, you will understand how to create, activate and install dependencies into a virtual Python Flask tutorial showing IntelliSense, debugging, and code navigation support in Visual Studio Code, the best Python IDE. py Use no hangup to run the program in the background even if you close your terminal, nohup /path/to/test. Is it possible to run a Python programs as a Windows service (i. Let's begin by starting our container with a name: docker run -d -p 5000:5000 --name flask-app-test flask-app You can also avoid the -d flag and get the logs right onto your screen. 8. We'll show you how to run your application continuously with that server. It is easy to configure. PM2 is a daemon process manager that will help you manage and keep your Show the output from starting your flask application, together with the command you used to start it. Get insights into implementing asynchronous jobs to improve user experience and scalability. It uses a single process with multiple thread workers. WSGI Web Server Aug 11, 2022 · Flask provides the flask run CLI command for running our applications from our terminals on Windows, macOS, and Linux. Jun 16, 2021 · python3 -m flask run How can I run the above code in Windows? When I write it in the command prompt, the following appears: Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings > Manage App Execution Aliases. py is a simple Flask app: from flask import Flask app = Flask (__name__) @app. Aug 7, 2015 · While your statement on async support in Flask >=2. Jul 22, 2020 · 3. Make sure that you use pythonw to run in the background (or else you will have a command prompt sitting around forever) 4. Here’s 3 days ago · This seamless experience is possible by combining Flask (a lightweight Python web framework) with client-side JavaScript (AJAX) to run Python code in the background. Be sure to read its Jul 19, 2019 · I have a running Flask app but want to pass any command via URL and make flask execute it on a host server and return results. It tends to integrate easily with hosting platforms. There are many modules or frameworks which allow building your webpage using python like a bottle, Django, Flask, etc. Any idea how I would go about running (scheduling) this script to I made this python script that gives a windows notification if your capslock is on or off. Never use this command to deploy publicly, use a production WSGI server such as Gunicorn, uWSGI, Waitress, or mod_wsgi. Dec 1, 2019 · On Windows, you can use pythonw. It will serve on IPv4 for localhost only on port 8001. It can work with Python only and it is a web-developing framework. Jun 12, 2019 · Preparing the virtual environment to run our Python 3 application Before continuing on, be sure to go through the tutorial on how to use a Python 3 virtual environment in Windows 10. To make it work in the background I started it within a screen session. Imagine we have a Flask app Mar 28, 2017 · Though windows is not a perfect environment to install python, sometimes situation force you to do it. e. Follow this comprehensive guide to set up your Flask API on an IIS server step-by-step. The script works but the problem is, whenever I close VSCODE it stops from working. 15K subscribers Subscribed Feb 14, 2024 · Flask and Celery are two popular Python libraries that can be used together to build web apps requiring background task processing. One way to do this is by using the nohup command. If you're on windows, create a batch script that runs a python script and then you can schedule and do other various things (however/whenever you wanna run it) with task scheduler. py with the main code. kjnmrwcrunppesgoesqjysjiubbnzzvzcbxlhixkwvpzncpzqpeorqrwmwfbnuhupsatjinmgkedzayvmlmzliaibwfoarhletccju