Debugging techniques

In this part, I'll present you with the most common techniques, the ones I use most often; however, please don't consider this list to be exhaustive.

Debugging with print

This is probably the easiest technique of all. It's not very effective, it cannot be used everywhere, and it requires access to both the source code and a Terminal that will run it (and therefore show the results of the print function calls).

However, in many situations, this is still a quick and useful way to debug. For example, if you are developing a Django website and what happens in a page is not what you would expect, you can fill the view with prints and keep an eye on the console while you reload the page. When...