December 2018
Beginner to intermediate
796 pages
19h 54m
English
Content preview from Learn Web Development with Python
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Philosophy – don't invent a programming language
A common question among beginners is how to perform numeric computations such as finding percentages in templates. As a design philosophy, the template system does not intentionally allow the following:
- Assignment to variables
- Function call arguments
- Advanced logic
This decision was made to prevent you from adding business logic in templates. From my experience with PHP or ASP-like languages, mixing logic with presentation can be a maintenance nightmare. However, you can write custom template tags (which will be covered shortly) to perform any computation, especially if it is presentation-related.
Best Practice
Keep business logic out of your templates.
Despite this advice, some prefer ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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