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2021 May 27

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May
2021

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In Education

How To Make a Web Application Using Flask in Python 3

On 27, May 2021 | No Comments | In Education | By sakiko

Jinja2 is a web template engine that combines a template with a certain data source to render dynamic web pages. In Easy Language, It combines a template (the layout of the page) with data (the specific information you want to show) to create a dynamic web page. You’ve run your application and displayed information on the web browser.

You can also include custom strings, integers, and other kinds of characters in the URL’s and display relevant results for them. Whenever a user visits a URL, the method attached to it executes. You can create your routes and specify the things functions should do when particular routes are called. The microframework in case of flask does not mean it can only do little or provides less functionality. It means it is more extensible and gives you the freedom to choose and decide the custom extensions and plugins to use. This can be helpful, as we shall see in the next part of the tutorial when we work on user management.

Next, add the following view function at the end of the app.py file:

This will make managing HTML much easier by writing your HTML code in .html files as well as using logic in your HTML code. In the following line, we check to see if the form submission was valid (note that this route will also accept POST requests to it) via the form.validate_on_submit() method. If it is, then we create a new Club instance with name, description, and categories corresponding to the form fields. We then add the new club instance to the database session and commit the session.

One more thing you need to do is to download the templates available in the Flask -user Github repository, to add customizations to your login page. To do that you need to create a template folder in your project folder which to store all the HTML files that you use for your web application. Now that we have created a virtual environment, and installed flask, we can begin to write code. Below is the system to run a simple web application that says Hello world. You can create a flask application in a single file as described below.

With the development server running, open your browser and visit the following URL:

How do Apple’s servers know to serve you the specific page that shows the details about Mac devices. The logic behind figuring out what to do when someone goes to /mac/ is done by a route. In the upcoming sections, you’ll add a navigation menu and style your web application.

Advanced Python Web Dev Using Flask Lessons

The color scheme for the links provides a visual cue to users about clickable elements. The overall layout and alignment of the web elements give the website a clean and modern look. When you visit your Advanced Python Web Dev Using Flask Lessons Home page, then you can click the link to the About page. Since there’s no link to the Home page, you’d need to either use the Back button of your browser or enter the URL manually in the address bar.

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