python flask crash course
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in this crash course, we'll walk through the basics of building a web application using python and flask. flask is a lightweight web framework that makes it easy to get started with web development in python. by the end of this tutorial, you'll have a simple web application that displays a "hello, world!" message.
make sure you have python installed on your system. you can download it from python.org. additionally, it's recommended to have a basic understanding of python.
open your terminal or command prompt and run the following command to install flask:
create a new file named app.py and open it in your preferred code editor.
this code sets up a basic flask application with a single route ('/') that returns a "hello, world!" message.
back in your terminal or command prompt, navigate to the directory where app.py is located and run the following command:
this will start the development server, and you should see output indicating that the server is running.
visit http://127.0.0.1:5000/ in your web browser, and you should see the "hello, world!" message.
let's enhance our application by using an html template. create a new folder named templates in the same directory as app.py. inside the templates folder, create a file named index.html with the following content:
modify app.py to render the template:
now, when you run your app and visit the page, you should see the same "hello, world!" message, but this time it is rendered using the html template.
congratulations! you've completed a basic flask crash course. from here, you can explore more features of flask, such as handling forms, working with databases, and building more complex web applications. check out the flask documentation for further information and guidance.
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