Build a web application from scratch and its follow on posts for request handling middleware explores the fundamentals of web development. Learning these foundational concepts is critical for a web developer even though you should still plan to use an established web framework such as Django or Flask to build real-world applications. The open source code for these posts is available on GitHub. While not Python-specific, Mozilla put together a Learning the Web tutorial for beginners and intermediate web users who want to build websites.
It's worth a look for general web development learning. Web development involves HTTP communication between the server, hosting a website or web application, and the client, a web browser. Knowing how web browsers works is important as a developer, so take a look at this article on what's in a web browser. Ping at the speed of light dives into the computer networking weeds with how fast packets travel through the internet plumbing. The author created a Python script that scrapes network speeds from disparate locations to see what the network speed is in fiber optic cables as a percentage of the speed of light.
The critical path: optimizing load times with the Chrome DevTools provides a well-written explanation about using Chrome's developer features to improve the performance of your websites and web applications. Three takeaways for web developers after two weeks of painfully slow Internet is a must-read for every web developer.
Not everyone has fast Internet service, whether because they are in a remote part of the world or they're just in a subway tunnel. Optimizing sites so they work in those situations is important for keeping your users happy. The History of the URL: Path, Fragment, Query, and Auth gives a comprenhensive historical perspective on the fundamental way to link to resources on the web.
This post should be required reading for web developers. Quantum Up Close: What is a browser engine? How to understand performance tests is an important topic because many websites are slow and bloated. Learning about improving the performance of your site is one of the best ways to become a better web developer. Another great article on website performance is The average web page is 3MB. I guess my question is - with Python web frameworks, can Python be used as easily in presentation logic in that sense, or is there again some fundamental difference between PHP and Python which allows Python to accomplish the same presentation goals but in an entirely different way?
I think the most similar thing to pure PHP templating is the Mako template library. It has a template language that reuses the Python language for the programmatic part of the language making it really powerful and easy to learn if you already know Python. That said, python is much easier than PHP. However, if you are searching for a new, better way of doing things, python is for you. I didn't know that; guess I should read up some more. Mixing presentation with domain logic is bad practice.
But if you're not outputting data that comes from the domain, what's the point of using a dynamic language to begin with? Instead of writing a single file, just write code that isolates business logic from input and presentation, permitting independent development, testing and maintenance of each.
Code that does something is in a python file. The HTML has just a few placeholders for showing results and simple structures like for s to render multiple elements. You might find the "Design your templates" section of "Django at a glance" helpful: docs.
See also the section " Mixing business logic with presentation markup is bad practice. But there is often significant presentation logic too; it makes perfect sense to use Python inside HTML for this purpose. Which is just as bad as before. Show 2 more comments. Jon Winstanley Jon Winstanley Lennart Regebro Lennart Regebro k 40 40 gold badges silver badges bronze badges. Barun Barun 2, 29 29 silver badges 34 34 bronze badges. Sign up or log in Sign up using Google.
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Typically an HTML file begins with a doctype declaration. To make reading our code easier, we will omit the doctype in this example. Recall a multi-line string is created by enclosing the text in three quotation marks see below. Save the above program as write-html. The content should look like this:. Select helloworld. You should now be able to see your message in the browser. Take a moment to think about this: you now have the ability to write a program which can automatically create a webpage.
There is no reason why you could not write a program to automatically create a whole website if you wanted to. We automatically created an HTML file, but then we had to leave our editor and go to Firefox to open the file in a new tab. Type or copy the code below and save it as write-html When you execute it, it should create your HTML file and then automatically open it in a new tab in Firefox.
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