python flask web application tutorial for beginners
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welcome to the world of web development with python flask! flask is a lightweight web framework that makes it easy to build web applications quickly and with minimal code. in this tutorial, we will guide you through the process of creating a simple web application using flask. by the end, you'll have a basic understanding of how flask works and be ready to explore more advanced features.
before we start, make sure you have the following installed on your machine:
create a new directory for your project and navigate into it using your terminal or command prompt:
it's a good practice to use a virtual environment to isolate your project's dependencies. create a virtual environment using the following commands:
activate the virtual environment:
create a file named app.py in your project directory and open it in your favorite text editor.
this simple flask app defines a route for the root url ("/") that returns the message "hello, flask!".
in your terminal or command prompt, run the following command to start the flask development server:
visit http://localhost:5000 in your web browser, and you should see your "hello, flask!" message.
let's make our application a bit more interesting. update your app.py file:
now, create a new directory named templates in your project directory, and inside it, create a file named index.html with the following content:
run your flask app again and see the updated message on http://localhost:5000.
congratulations! you've just built a simple flask web application. this tutorial provides a foundation for you to explore more advanced flask features and start building more complex web applications.
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