Python app can t find Flask SQLAlchemy when deployed to Google App Engine

Title: Troubleshooting Flask-SQLAlchemy Deployment Issues on Google App Engine
Google App Engine (GAE) is a powerful platform for deploying and managing web applications. When deploying a Python application using Flask and Flask-SQLAlchemy to GAE, you might encounter issues related to the Flask-SQLAlchemy library not being found. In this tutorial, we'll explore common reasons for this problem and provide solutions to ensure a smooth deployment.
Before you begin, make sure you have the following:
When deploying a Flask application to Google App Engine that relies on Flask-SQLAlchemy, you may encounter the error:
This error occurs when the required libraries are not available in the deployed environment.
If you are using a virtual environment locally, make sure to activate it and install the required packages before deploying. Additionally, include the virtualenv directory in your project's .gitignore file to prevent unnecessary files from being deployed.
This specifies the Python 3.9 runtime, which is known to work well with Flask applications.
This ensures that Flask is available in your App Engine environment.
Before deploying, ensure that your application runs locally without any issues. Use the following command to test your app locally:
This will start a local development server, allowing you to identify and fix any issues before deploying to GAE.
Deploy your application to Google App Engine using the following command:
Follow the prompts to deploy your app. Once deployed, open the URL provided by the deployment process to see your application running on GAE.
By following these steps, you should be able to resolve issues related to Flask-SQLAlchemy not being found when deploying your Flask application to Google App Engine. Remember to keep your dependencies up-to-date, and thoroughly test your application locally before deploying to ensure a smooth transition to the cloud environment.
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