Скачать или смотреть How to Execute a Python Script with Flask Using a Button Click

Learn how to set up a Flask application that executes Python functions when buttons are clicked. Follow our step-by-step guide to resolve common issues and enhance user interaction with your web app.
---
This video is based on the question https://stackoverflow.com/q/64243070/ asked by the user 'Lucas Christensen' ( https://stackoverflow.com/u/14407007/ ) and on the answer https://stackoverflow.com/a/64243313/ provided by the user 'simkusr' ( https://stackoverflow.com/u/8843270/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Executing python script with flask, from button

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Execute a Python Script with Flask Using a Button Click

Are you looking to enhance your Flask application by executing Python scripts or functions with a simple button click? If you’ve been hitting a wall trying to implement this feature, you’re in the right place. In this guide, we’ll guide you through the process of setting up your Flask application to execute various Python functions based on user interactions with HTML buttons. Let’s dive into it!

Understanding the Problem

The original challenge was to execute a Python function when a button in an HTML form is clicked. The provided Python script had some basic structure but lacked the needed functionality to execute the functions from the front end. Your aim is to create a user-friendly experience that allows for easy interactions with your web application.

Solution Breakdown

To fix the issue, we’ll focus on two primary areas: the Python backend code and the HTML frontend code. Here’s how to successfully implement this feature:

1. Update Flask Python Code

Here’s a refined version of your Python Flask code. This includes creating a route that accepts POST requests and responding appropriately:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes:

Routing for Contact: Added the @ app.route('/contact', methods=['POST']) decorator to specifically handle POST requests for the /contact endpoint.

JSON Response: Utilized jsonify to return a structured JSON object with results, making it easier to handle responses on the frontend.

2. Update the HTML Code

Next, let’s update the HTML code in your index.html file to include a form that submits the button actions to the backend:

[[See Video to Reveal this Text or Code Snippet]]

Important Changes:

Form Tag: Wrapped the buttons in a <form> tag with the action attribute pointing to the /contact route, facilitating the proper submission of button actions.

Method POST: Specified method="post" to ensure form data is sent correctly.

How It Works Together

With these adjustments made, you can now click the "Open" or "Close" buttons, which send a POST request to the Flask backend. The handler function contact() determines which button was pressed and executes the corresponding Python function (activate_lamp() or deactivate_lamp()), returning the results as a JSON response.

Using AJAX (Optional): You can further enhance this by implementing AJAX calls to interact with the Flask function without refreshing the page.

Conclusion

Implementing a button to execute Python scripts in Flask can enhance user interaction effectively. By ensuring your Flask application routes are correctly set up and that your HTML form correctly submits data, you can create a dynamic and responsive web application. Don’t hesitate to experiment with different function calls or expand this setup for more functionalities! Happy coding!